To edit Variable Options, go to Tools -> Options -> Automise -> General.
Enable Variable Sense
Variable Sense allows you to see a drop-down list with possible completions for variable names:
The list opens automatically when you type % to begin entering a Target Parameters.
Design Time Variables
Variable Values to show in hints at design time
When you hover your mouse over an text field or memo box on an action's property page, you will see a hint field with all of the variable references in that field expanded:
You can choose to use either the Variables' Default Values, or their Current Values, during this expansion.
Resetting Variables at Runtime
Reset Variables When
Non-persistent variables are reset to their default values each time a project is run. By selecting these options, you can also choose whether they are reset when running part of a project.