I had a map made by someone else and wanted to see the spawnpoints so what I did was make myself this small script . I call it my showbox.scr . What it does is you put this in your script

exec global/showbox.scr::show origin width length height color

like this

exec global/showbox.scr::show ( 100 444 999) 32 32 96 ( 0 0 1)

Those numbers are made up but what I did was open the bsp in notepad and found all the spawnpoints then used them with my script . This would be good when you are spawning something and useing setsize so that you can see in game if it where you wanted it . 

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Use this script to create a box in the map useing beams

   This mod will draw a box with beams useing your coords

syntax:
exec global/showbox.scr::show origin width length height color

or if useing like setsize

exec global/showbox.scr::setsize origin ( coords1 )( coords 2 ) color

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Bdbodger