# Del function argument

Hotkey: Shift-Del

This command removes an argument or the return type from a function prototype. It can be applied to the prototype of the current function as well as to any called function.

It is available only when the cursor is on a function argument or on the return type. As a result of this command, the function prototype is modified: the selected argument is removed from the argument list. If necessary, the calling convention is replaced by a new one.

Please note that other register arguments do not change their locations. This logic ensures that a stray argument in the argument list can be deleted with a keypress.

When applied to the function return type it will convert it to "void".

This command is available starting from v7.5.

See also: [interactive operation](/9.0sp1/user-guide/decompiler/interactive.md), [Add/delete function return type](/9.0sp1/user-guide/decompiler/interactive/cmd_adddel_rettype.md).


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hex-rays.com/9.0sp1/user-guide/decompiler/interactive/cmd_delarg.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.