> For the complete documentation index, see [llms.txt](https://docs.hex-rays.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hex-rays.com/ida-9.3/ida-actions/renameregister.md). # RenameRegister ## Description Rename a general processor register. This command allows you to rename a processor general register to some meaningful name. While this is not used very often on IBM PCs, it is especially useful on RISC processors with lots of registers. For example, a general register R9 is not very meaningful and a name like 'CurrentTime' is much better. This command can be used to define a new register name as well as to remove it. Just move the cursor on the register name and press enter. If you enter the new register name as an empty string, then the definition will be deleted. If you have selected a range before using this command, then the definition will be restricted to the selected range. But in any case, the definition cannot cross the function boundaries. You cannot use this command if the current instruction does not belong to any function. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.hex-rays.com/ida-9.3/ida-actions/renameregister.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.