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IDA 9.1
IDA 9.1IDA 9.0sp1IDA 9.0IDA 8.5IDA 8.4
IDA 9.1
IDA 9.1IDA 9.0sp1IDA 9.0IDA 8.5IDA 8.4
  • Welcome to Hex-Rays docs
    • What's new?
  • Getting Started
    • Install IDA
    • Licensing
    • Basic Usage
    • What's next?
  • User Guide
    • User Interface
      • Menu Bar
        • File
          • Load file
          • Script File
          • Script command
          • Produce output files
          • Invoke OS Shell
          • Take database snapshot
          • Save database
          • Save database as...
          • Abort IDA
          • Exit IDA
        • Edit
          • Export data
          • Undo an action
          • Redo an action
          • Clear undo history
          • Disable undo
          • Convert to instruction
          • Convert to data
          • Convert to string literal
          • Convert to array
          • Undefine a byte
          • Give Name to the Location
          • Operand types
            • Offset
            • Number
            • Perform en masse operation
            • Convert operand to character
            • Convert operand to segment
            • Complex Offset Expression
            • Convert operand to symbolic constant (enum)
            • Convert operand to stack variable
            • Change operand sign
            • Bitwise negate operand
            • User-defined operand
            • Set operand type
          • Comments
          • Functions
          • Structs
          • Segments
          • Patch core
          • Other
            • Rename Any Address
          • Plugins
        • Jump
          • Center current line in window
          • Problems List
        • Search
          • REGULAR EXPRESSION SYNTAX SUMMARY
        • View
          • Open subviews
          • Graphs
          • Arrows window
          • Database snapshot manager
          • Highlighting identifiers
          • Browser options
          • Lumina options
          • Assembler level and C level types
          • C++ type details
          • Bookmarks window
          • Calculator
          • View segment registers
          • View Internal Flags
          • Hide
          • Unhide
          • Del hidden range
          • Hide all items
          • Unhide all items
          • Setup hidden items
        • Debugger
          • Debugger window
          • Process Control
            • Start process
            • Process options
            • Pause process
            • Terminate process
            • Step into
            • Step over
            • Run to cursor
            • Run until return
            • Attach to process
            • Detach from process
            • Set current ip
            • Show application screen
          • Breakpoints
          • Watches
          • Tracing
          • Source code view
            • Watch view (source level)
          • Process Memory
            • Take memory snapshot
            • Manual memory regions
            • Refresh memory
          • Thread list
          • Module list
          • Stack trace
          • Exceptions
          • Debugger options
          • Switch debugger
        • Lumina
        • Options
          • Low & High Suspicious Operand Limits
        • Windows
          • Rename a stack variable
          • Miscellanous Options
          • Environment variables
          • Reset Hidden Messages
          • Various dialog help messages
          • Output window
        • List of all menu options
      • Desktops
      • Command line
      • How To Use List Viewers in IDA
      • Database conversion from idb to i64
    • Disassembler
      • Interactivity
      • Background Analysis
      • Graph view
        • Graphing tutorial
      • Proximity view
      • Navigation
        • Anchor
        • How to Enter a Segment Value
        • How to Enter a Number
        • How to Enter an Identifier
        • How to enter text
        • How to Enter an Address
      • Disassembly Gallery
        • Philips 51XA-G3
        • 6502 and 65C02 Disassembler
        • 6301, 6303, 6800, 6801 and 6803 Disassembler
        • 68040, Amiga
        • 6805 Disassembler
        • 6808 Disassembler
        • 6809 OS9 Flex Disassembler
        • 6809 Disassembler
        • 6811 Disassembler
        • 68HC12 Disassembler
        • 68HC16 Disassembler
        • 68k Amiga Disassembler
        • 68k Mac OS
        • 68k Palm Pilot
        • Unix COFF
        • NEC 78k0 and 78k0s Processor
        • 80196 Processor
        • 8051 Disassembler
        • Analog Devices 218x.
        • Alpha Processor – NT COFF
        • Alpha Processor – Unix ELF
        • Android ARM Executables (.elf)
        • ARC Processor
        • ARM Processor EPOC App
        • ARM Processor EPOC PE File
        • ARM Processor EPOC ROMFile
        • EPOC SIS File Handler
        • ARM Processor iOS (iPhone): Unlock
        • ARM Processor iOS (iPhone): Objective-C metadata
        • ARM Processor iOS (iPhone): Objective-C Instance variables
        • ARM Processor iOS (iPhone): Parameter Identification & Tracking (PIT)
        • ARM Processor iOS (iPhone): Start
        • ARM Processor iOS (iPhone): Switch statements
        • ARM Processor iOS (iPhone): C++ signatures
        • ARM Processor iOS (iPhone): Write
        • ARM Processor: Linux ELF
        • ARM Processor: AOF SDK
        • ARM Processor: Windows CE COFF Format
        • ARM Processor: Windows CE PE Format
        • ATMEL AVR Disassembler
        • C166 Processor
        • C166 Processor with ELF file
        • Rockwell C39
        • Microsoft .NET CLI Disassembler. VisualBasic library
        • CR16
        • Android Dalvik Executables (.dex)
        • Microsoft .NET CLI Disassembler
        • DSP56K
        • Fujitsu FR (.elf)
        • Gameboy
        • H8 300: COFF FILE Format
        • H8 300s: COFF FILE Format
        • H8 500
        • HPPA Risc Processor: HP-UX SOM
        • i51
        • i860
        • Intel i960
        • Intel IA-64 (Itanium)
        • Java Bytecode
        • Angstrem KR 1878
        • Renesas/Hitachi M16C
        • Renesas/Hitachi M32R
        • M740
        • M7700
        • M7900
        • MIPS Processor: Nintendo N64
        • MIPS R5900 Processor : Sony bin
        • MIPS Processor: Sony ELF
        • MIPS Processor: Sony PSX
        • MIPS Processor: Sony PSX
        • MIPS Processor: Unix COFF File Format
        • MIPS Processor: Unix ELF File Format
        • MIPS Processor: Windows CE PE File Format
        • MIPS Processor: Windows CE PE2 File Format
        • Panasonic MN102
        • Atmel OAK DSP
        • 80×86 Architecture: DOS Extender
        • 80×86 Architecture: Watcom Runtime
        • 80×86 Architecture: Geos APP
        • 80×86 Architecture: Geos DRV
        • 80×86 Architecture: Geos LIB
        • 80×86 Architecture: GNU COFF Format
        • 80×86 Architecture: OS/2 Linear Executable Format
        • 80×86 Architecture: Netware NLM
        • 80×86 Architecture: QNX Executable
        • 80×86 Architecture: Watcom Runtime
        • 80×86 Architecture: Windows OMF
        • 80×86 Architecture: Windows Portable Executable Format
        • 80×86 Architecture: Windows Virtual Device Driver
        • 80×86 Architecture: Windows 16 bits DLL
        • X-Box Disassembler
        • PDP 11: SAV File
        • PIC
        • PIC 12xx
        • Power PC AIF ECOFF file Format
        • Power PC Linux ELF
        • Mac OS PEF File
        • Mac OS X File
        • Windows NT PE File
        • Hitachi SH-1 Processor
        • Hitachi SH-3 Processor: Windows CE COFF format
        • Hitachi SH-3 Processor: Windows CE PE format
        • Hitachi SH-4 Processor: ELF File Format
        • Hitachi SH-4 Processor: Windows CE PE File Format
        • Super Nintendo Entertainement System (SNES)
        • SPARC Solaris COFF
        • SPARC Solaris ELF
        • SPARC Sun ELF
        • SPARC Sun ELF SO
        • ST 20C4
        • ST 7
        • ST 9
        • Toshiba TLCS 900
        • TMS 320c2 COFF
        • TMS 320c5
        • TMS 320c54
        • TMS 320c6 COFF File Format
        • TRICORE
        • SunPlus unSP
        • NEC V850
        • Z180 COFF File Format
        • Z380 COFF File Format
        • Z8
        • Z80
      • Supported processors
      • Supported file formats
        • Windmp file loader
      • Bitfields
        • Bit Fields tutorial
      • Structures tutorial
      • Union tutorial
      • Variable length structures tutorial
      • Data types, operands and constructs
      • Packed executables
    • Decompiler
      • Prerequisites
      • Quick primer
      • Exception handler
      • Introduction to Decompilation vs. Disassembly
        • Comparisons of ARM disassembly and decompilation
        • Comparisons of PowerPC disassembly and decompilation
        • Comparisons of MIPS disassembly and decompilation
        • Hex-Rays v7.4 vs. v7.3 Decompiler Comparison Page
        • Hex-Rays v7.3 vs. v7.2 Decompiler Comparison Page
        • Hex-Rays v7.2 vs. v7.1 Decompiler Comparison Page
      • Interactive operation
        • Rename
        • Set type
        • Set number representation
        • Edit indented comment
        • Edit block comment
        • Hide/unhide C statements
        • Split/unsplit expression
        • Force call type
        • Set call type
        • Add/del variadic arguments
        • Del function argument
        • Add/delete function return type
        • Jump to cross reference
        • Jump to cross reference globally
        • Generate HTML file
        • Mark/unmark as decompiled
        • Copy to assembly
        • Show/hide casts
        • Reset pointer type
        • Convert to struct *
        • Create new struct type
        • Split variable
        • Select union field
        • Jump to paired paren
        • Collapse/uncollapse item
        • Map to another variable
      • Batch operation
      • Configuration
      • Third party plugins
      • Floating point support
      • Support for intrinsic functions
      • Overlapped variables
      • gooMBA
      • Failures and troubleshooting
      • FAQ
      • Limitations
      • Tips and tricks
    • Debugger
      • Instant debugger
      • Remote debugging
        • Remote iOS Debugger
        • Android debugger
        • Dalvik debugger
        • Remote GDB Debugger
          • Remote GDB Debugger options
          • Debugging with gdbserver
          • Debugging with VMWare
          • Debugging with OpenOCD
          • Debugging with QEMU
          • External programs and GDB Debugger
          • Debugging code snippets with QEMU
        • PIN debugger
          • Building the PIN tool
          • Connecting a remote PIN tool instance from IDA
          • PIN support for MacOSX
        • Replayer debugger
        • Bochs debugger
          • Bochs Disk Image operation mode
          • Bochs IDB operation mode
          • Bochs PE operation mode
          • Bochs debugger FAQ
      • Local debugging
        • WinDbg Debugger
        • WinDbg: Time Travel Debugging
        • Linux debugger
        • Intel/ARM macOS debugger
      • Debugger tutorials
        • Debugging Dalvik Programs
        • IDA Win32 Local Debugging
        • IDA Linux Local Debugging
        • IDA Linux to Win64 Debugging
        • IDA Win32 to Linux Debugging
        • Debugging Mac OSX Applications with IDA Pro
        • Debugging iOS Applications using CoreDevice (iOS 17 and up)
        • Debugging iOS Applications with IDA Pro
        • Debugging Linux Applications locally
        • Debugging Linux/Windows Applications with PIN Tracer module
        • Debugging Windows Applications with IDA Bochs Plugin
        • Debugging Windows Applications with IDA WinDbg Plugin
        • Using the Bochs debugger plugin in Linux
        • Debugging Windows Kernel with VMWare and IDA WinDbg Plugin
        • Debugging Linux Kernel under VMWare using IDA GDB debugger
        • Windows Debugger Hub
        • Linux Debugger
        • Debugging a Windows executable locally and remotely
        • Debugging the XNU Kernel with IDA Pro
        • Remote debugging with IDA Pro
        • IDA Scriptable Debugger: overview
          • IDA Scriptable Debugger: scriptability
        • Debugging code snippets with QEMU debugger (a la IDA Bochs debugger)
        • Trace Replayer and managing traces
        • Using IDA Pro's tracing features
        • Working with PIN
        • Appcall
    • Creating Signatures
      • FLIRT
        • IDA F.L.I.R.T. Technology: In-Depth
        • Generate FLIRT signature file
        • Supported Compilers
          • Turbo Pascal
          • Delphi
      • Makesig
    • Types
      • Creating Type Libraries
        • IDAClang
        • TILIB
    • Configuration
      • Configuration files
      • Command line switches
      • Keyboard macros
      • UI/Fonts/Themes
      • Shortcuts
      • Customizing IDA
      • CSS-based styling
    • Teams
      • Diffing and Merging Databases with IDA Teams
      • Teams lc command reference manual
      • hv command reference manual
      • Hex-Rays Vault’s visual client user manual
    • Lumina
      • lc command reference manual
    • Plugins
      • Open Plugin Architecture
      • Plugin options
      • Plugins Shipped with IDA
        • Swift plugin
        • Golang plugin
        • Rust plugin
        • picture_search
        • Objective-C Analysis Plugin
        • DYLD Shared Cache Utils
        • Borland RTTI descriptors plugin
        • DWARF plugin
        • Patfind plugin
        • IDA Feeds
          • FLIRT Signature Bundle
      • Plugin Contest
      • How to write your own plugin?
    • Helper Tools
    • idalib
    • Licenses
      • Apache License for Ghidra
      • Apache License for LLVM
      • Common Public License Version 1.0
      • APPLE PUBLIC SOURCE LICENSE
      • PCRE2 LICENCE
      • GNU Lesser General Public License v2.1 for libiberty
    • Floating licenses
  • Developer Guide
    • C++ SDK
      • Getting Started
      • Reference
      • Using the Decompiler SDK: Decompiler plugin
      • Examples
      • How to create a plugin?
      • Porting Guide from IDA 8.x to 9.0
    • IDAPython
      • Getting Started
      • Reference
      • Examples
      • How to create a plugin?
      • Porting Guide from IDA 8.x to 9.0
    • IDC
      • Core concepts
        • Expressions
        • Statements
        • Functions
        • Variables
        • Constants
        • Exceptions
        • Classes
        • Predefined symbols
        • loader_input_t class
        • Slices
      • Reference
        • Index of debugger related IDC functions
        • Alphabetical list of IDC functions
          • add_auto_stkpnt
          • add_bpt
          • add_cref
          • add_default_til
          • add_dref
          • add_entry
          • add_enum
          • add_enum_member
          • add_func
          • add_hidden_range
          • add_idc_hotkey
          • add_segm_ex
          • add_sourcefile
          • add_struc
          • add_struc_member
          • add_user_stkpnt
          • append_func_tail
          • apply_type
          • ask_addr
          • ask_file
          • ask_long
          • ask_seg
          • ask_str
          • ask_yn
          • atoa
          • atol
          • attach_process
          • auto_mark
          • auto_mark_range
          • auto_unmark
          • auto_wait
          • batch
          • begin_type_updating
          • byte
          • byte_value
          • calc_gtn_flags
          • call_system
          • can_exc_continue
          • check_bpt
          • choose_func
          • cleanup_appcall
          • clear_selection
          • clear_trace
          • clr_database_flag
          • collect_stack_trace
          • compile_idc_file
          • compile_idc_text
          • create_align
          • create_array
          • create_byte
          • create_custom_data
          • create_data
          • create_double
          • create_dword
          • create_enum_type
          • create_float
          • create_insn
          • create_oword
          • create_pack_real
          • create_qword
          • create_strlit
          • create_struct
          • create_tbyte
          • create_word
          • create_yword
          • dalvik_get_array_elem
          • dalvik_get_array_size
          • dalvik_get_instance_fld
          • dalvik_get_local
          • dalvik_get_local_typed
          • dbg_appcall
          • decode_insn
          • define_exception
          • define_local_var
          • del_array_element
          • del_bpt
          • del_cref
          • del_dref
          • del_enum
          • del_enum_member
          • del_extra_cmt
          • del_fixup
          • del_func
          • del_hash_string
          • del_hidden_range
          • del_idc_hotkey
          • del_items
          • del_segm
          • del_selector
          • del_source_linnum
          • del_sourcefile
          • del_stkpnt
          • del_struc
          • del_struc_member
          • del_user_info
          • delattr
          • delete_all_segments
          • delete_array
          • demangle_name
          • detach_process
          • diff_trace_file
          • dword
          • enable_bpt
          • enable_tracing
          • end_type_updating
          • error
          • eval
          • EVAL_FAILURE
          • eval_python
          • exec_idc
          • exec_python
          • exit_process
          • expand_struc
          • fclose
          • fgetc
          • filelength
          • find_binary
          • find_code
          • find_custom_data_format
          • find_custom_data_type
          • find_data
          • find_defined
          • find_func_end
          • find_imm
          • find_selector
          • find_suspop
          • find_text
          • find_unknown
          • first_func_chunk
          • firstattr
          • fopen
          • force_bl_call
          • force_bl_jump
          • forget_exception
          • format_cdata
          • fprintf
          • fputc
          • fseek
          • ftell
          • func_contains
          • gen_file
          • gen_flow_graph
          • gen_simple_call_chart
          • generate_disasm_line
          • get_appcall_options
          • get_array_element
          • get_array_id
          • get_bmask_cmt
          • get_bmask_name
          • get_bookmark
          • get_bookmark_desc
          • get_bpt_attr
          • get_bpt_ea
          • get_bpt_qty
          • get_bpt_tev_ea
          • get_bytes
          • get_call_tev_callee
          • get_cmt
          • get_color
          • get_curline
          • get_current_tev
          • get_current_thread
          • get_db_byte
          • get_debug_name
          • get_debug_name_ea
          • get_debugger_event_cond
          • get_double
          • get_entry
          • get_entry_name
          • get_entry_ordinal
          • get_entry_qty
          • get_enum
          • get_enum_cmt
          • get_enum_flag
          • get_enum_member
          • get_enum_member_bmask
          • get_enum_member_by_name
          • get_enum_member_cmt
          • get_enum_member_enum
          • get_enum_member_name
          • get_enum_member_value
          • get_enum_name
          • get_enum_size
          • get_enum_width
          • get_event_bpt_hea
          • get_event_ea
          • get_event_exc_code
          • get_event_exc_ea
          • get_event_exc_info
          • get_event_exit_code
          • get_event_id
          • get_event_info
          • get_event_module_base
          • get_event_module_name
          • get_event_module_size
          • get_event_pid
          • get_event_tid
          • get_exception_code
          • get_exception_flags
          • get_exception_name
          • get_exception_qty
          • get_extra_cmt
          • get_fchunk_attr
          • get_fchunk_referer
          • get_field_ea
          • get_file_ext
          • get_first_bmask
          • get_first_cref_from
          • get_first_cref_to
          • get_first_dref_from
          • get_first_dref_to
          • get_first_enum_member
          • get_first_fcref_from
          • get_first_fcref_to
          • get_first_hash_key
          • get_first_index
          • get_first_member
          • get_first_module
          • get_first_seg
          • get_fixup_target_dis
          • get_fixup_target_flags
          • get_fixup_target_off
          • get_fixup_target_sel
          • get_fixup_target_type
          • get_flags
          • get_float
          • get_forced_operand
          • get_fpnum
          • get_frame_args_size
          • get_frame_id
          • get_frame_lvar_size
          • get_frame_regs_size
          • get_frame_size
          • get_full_flags
          • get_func_attr
          • get_func_cmt
          • get_func_flags
          • get_func_name
          • get_func_off_str
          • get_gotea
          • get_hash_long
          • get_hash_string
          • get_idb_path
          • get_imagebase
          • get_inf_attr
          • get_input_file_path
          • get_ip_val
          • get_item_end
          • get_item_head
          • get_item_size
          • get_last_bmask
          • get_last_enum_member
          • get_last_hash_key
          • get_last_index
          • get_last_member
          • get_local_tinfo
          • get_manual_insn
          • get_member_by_idx
          • get_member_cmt
          • get_member_flag
          • get_member_id
          • get_member_name
          • get_member_offset
          • get_member_qty
          • get_member_size
          • get_member_strid
          • get_min_spd_ea
          • get_module_info
          • get_module_name
          • get_module_size
          • get_name
          • get_name_ea
          • get_name_ea_simple
          • get_named_type_tid
          • get_next_bmask
          • get_next_cref_from
          • get_next_cref_to
          • get_next_dref_from
          • get_next_dref_to
          • get_next_enum_member
          • get_next_fchunk
          • get_next_fcref_from
          • get_next_fcref_to
          • get_next_fixup_ea
          • get_next_func
          • get_next_hash_key
          • get_next_index
          • get_next_module
          • get_next_offset
          • get_next_seg
          • get_nsec_stamp
          • get_numbered_type_name
          • get_numbered_type_tid
          • get_operand_type
          • get_operand_value
          • get_ordinal_limit
          • get_original_byte
          • get_prev_bmask
          • get_prev_enum_member
          • get_prev_fchunk
          • get_prev_fixup_ea
          • get_prev_func
          • get_prev_hash_key
          • get_prev_index
          • get_prev_offset
          • get_process_state
          • get_processes
          • get_processor_name
          • get_qword
          • get_reg_value
          • get_ret_tev_return
          • get_root_filename
          • get_screen_ea
          • get_segm_attr
          • get_segm_by_sel
          • get_segm_end
          • get_segm_name
          • get_segm_start
          • get_source_linnum
          • get_sourcefile
          • get_sp_delta
          • get_spd
          • get_sreg
          • get_step_trace_options
          • get_str_type
          • get_strlit_contents
          • get_struc_cmt
          • get_struc_id
          • get_struc_name
          • get_struc_size
          • get_tev_ea
          • get_tev_mem
          • get_tev_mem_ea
          • get_tev_mem_qty
          • get_tev_qty
          • get_tev_reg
          • get_tev_tid
          • get_tev_type
          • get_thread_qty
          • get_tinfo
          • get_trace_file_desc
          • get_type
          • get_wide_byte
          • get_wide_dword
          • get_wide_word
          • get_xref_type
          • getattr
          • getn_thread
          • getn_thread_name
          • guess_type
          • has_name
          • has_user_name
          • has_value
          • has_xref
          • hasattr
          • idadir
          • import_type
          • inf_is_32bit_or_higher
          • inf_is_64bit
          • inf_set_32bit
          • inf_set_64bit
          • is_align
          • is_bf
          • is_bin0
          • is_bin1
          • is_byte
          • is_char0
          • is_char1
          • is_code
          • is_code_far
          • is_custfmt0
          • is_custfmt1
          • is_custom
          • is_data
          • is_data_far
          • is_dec0
          • is_dec1
          • is_defarg0
          • is_defarg1
          • is_double
          • is_dword
          • is_enum0
          • is_enum1
          • is_event_handled
          • is_extra_cmts
          • is_float
          • is_float0
          • is_float1
          • is_flow
          • is_head
          • is_hex0
          • is_hex1
          • is_loaded
          • is_manual0
          • is_manual1
          • is_mapped
          • is_member_id
          • is_oct0
          • is_oct1
          • is_off0
          • is_off1
          • is_oword
          • is_pack_real
          • is_qword
          • is_seg0
          • is_seg1
          • is_stkvar0
          • is_stkvar1
          • is_strlit
          • is_stroff0
          • is_stroff1
          • is_struct
          • is_tail
          • is_tbyte
          • is_union
          • is_unknown
          • is_valid_trace_file
          • is_word
          • is_yword
          • JDWP_ArrayReference_GetValues
          • JDWP_ArrayReference_Length
          • JDWP_Method_Bytecodes
          • JDWP_Method_VariableTable
          • JDWP_Method_VariableTableWithGeneric
          • JDWP_ObjectReference_ReferenceType
          • JDWP_ReferenceType_Fields
          • JDWP_ReferenceType_Instances
          • JDWP_ReferenceType_Methods
          • JDWP_ReferenceType_NestedTypes
          • JDWP_ReferenceType_Signature
          • JDWP_ReferenceType_SourceFile
          • JDWP_StackFrame_GetValue
          • JDWP_StringReference_Value
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This command completely disables the undo feature.

See also

  1. User Guide
  2. User Interface
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  4. Edit

Disable undo

 Action    name: DisableUndo
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