Right click:
- 2nd entry "Find"
- then 2nd last "Find Identifier reference"
The "refactoring" is also in the context menu, in the refactoring you find the "rename identifier".
You also find those in the main menu. And I recommend to add key-combos (or maybe they are there by default).
Also install the package cody.
Menu: Packages > Install/uninstall packages
Then in the source menu you have the "unit / identifier dictionary"
It will be empty at first, but after some days of work it starts "learning".
You can then find any identifier, and add it to your code => and it will add the unit, and if required the package too.