Enhancement: Ability to highlight (or see references) of a defined variable in a test case

It will be helpful if the system shows me where in my test case I have a used a defined variable so I know the instances of the variable if I have to change the variable name. Or when I change a variable name, the system can change all the instances of that variable in the current test case.

For example if I used "SET_VAR" to define variable "test_var", I need to know which steps the variable "@test_var" is been used or the those instances change automatically when I change the variable name.