Vision in one spot

[Tagooo]

Hi!! I am building a map in starcraft x tra editor and à am building a stack place i know how to build the stack things but i dont know how to get
vision just around the stack spot beacuse every time i am in the map and playing and i take vision of,, after that i cant see the civs whos control the lights on/off things!?
How to do??
Sry 4 my bad eng, I am bad at eng!

 

[Laharl]

If you mean to keep the user centered on the location

Trigger:
Always
Action(s):
Center view on <location>
Preserve trigger