1. Ability to specify a parameter as "Extra", so that it is hidden unless the "Extra Options" button is pressed, like several built-in instructions.
2. Ability to add a description to the parameter that appears on mouse hover (like in the screenshot).
I often have extra parameters to alter subroutine behavior, and the names get very long to describe how they work or which values are allowed. As an example, I have one called "Array ID of blacklisted units (optional)". If I could shorten it to "Blacklist", add a description of "ID of an array containing blacklisted units" and mark it as "extra" so it's not visible unless needed, then it would make the Call instruction much neater.
These next two ideas might be more work than they are worth, but it would be cool if they existed:
3. Ability to turn a parameter into a dropdown menu, and each option in the list corresponds to a number. AKA, treating that parameter as an Enum.
4. Ability to turn a parameter into a checkbox. AKA, treating that parameter as a Boolean.
I can already do "enums" by setting the number manually and using a Switch, and I can do booleans by setting any value and using "Is empty", but it would be neat if Call could do that to make subroutines more presentable and intuitive.
