Odisholi, please avoid double posting, as it is against the forum rules. You can review our forum rules here. Thank you.
Is there anyway you can show me an example of what your saying? I've hardly touched variable.
your event was almost correct, you just need to replace the select key item with the control variable command.
When you create the control variable command, the window has several options at the bottom, one of them game data - by default that reads "Map ID" when you select it.
However, after selecting you also have a button with three dots to the right of that "map ID". click on that button.
The rest should be obvious.
Variables are the most important part of the engine if you want to make more than the simplest quest. Learn how to use them.
If you follow the link in my signature, one of the tutorials I listed there is the "variables guide" - work through that please.