How to globally replace variable names in idea?

To globally replace variable names, you can follow these steps:

1. Open your code editor or IDE.
2. Make sure your code files are open and search for occurrences of all variables within the global scope.
3. Use the search and replace function in the editor to replace all variable names with the new ones you desire.
4. Be sure to consider the scope of variable names when replacing them to avoid accidentally changing names in other places.
5. For certain programming languages, it may be necessary to consider replacing keywords or reserved words. Make sure you do not replace these special identifiers.
6. After completing the replacement, carefully check if your code can still run correctly. Make sure no existing logic is broken or new errors are introduced.
7. If your code is a project, you may also need to perform the same replacement operations in other files to ensure that all the code is updated.

It is important to note that globally replacing variable names can be a complex process, especially for large projects. Before conducting a global replacement, make sure to backup your code and have a sound testing plan in place to verify that the replacement does not cause any issues.