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i know im stupid but please help

how do i select several units all at once where the box pops up on screen? most rts games have this but i cant seem to find it in this one PLEASE HELP
Are you on mobile?
Best of regards, Wastelander (formerly Architecture), Overlord and Designated Leader of the Earth States.

Normally I use it on PC
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Ape Apps, LLC is an independent software development company founded in 2010 by Brandon Stecklein. Over the years, Ape Apps has published over 400 apps and games across various platforms. You can get in touch with Brandon on Twitter or by leaving a post on his wall @bastecklein
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