# Perform en masse operation If you have selected a range before applying an operand conversion command, IDA will display a dialog box. You can choose a range of operands to perform an en masse operation: ``` ALL OPERANDS ----------- ``` The operation will be performed on all operands as a toggle. For example, if you ask to convert to a character, then all non-character operands will become characters, and all character operands will become non-chars. ``` OPERAND VALUE RANGE ------------------- ``` The operation will be performed on the [void](/8.4/user-guide/user-interface/menu-bar/search.md#search-for-next-suspicious-operand) operands which contain immediate numbers in the specified range. ``` ... OPERANDS ------------ ``` This selection will convert all operands with the specified type to undefined operands. Example: all characters become non-characters. ``` NOT ... OPERANDS --------------- ``` This selection allows to convert all operands that do not have the specified type to the specified type. Example: all non-characters to characters. ``` NOT TYPED OPERANDS ----------------- ``` This selection allows to convert all operands without any type to the specified type. Example: all operands with no type to characters. ``` APPLY ONLY IF POSSIBLE --------------------- ``` IDA will check whether an operand can be represented with the specified type (as a character constant, for example), and perform type conversion only if the check is successful. --- # 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/8.4/user-guide/user-interface/menu-bar/edit/operand-types/perform-en-masse-operation.md?ask= ``` 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.