Ctrl-click doesn’t work!

I’m so confused, my ctrl-click doesn’t work at all… the only way I can select all units of a type is by double-clicking. It’s horrid. I’m used to ctrl-clicking in SC1, and now I’m playing like garbage in SC2 because of this. I don’t see a hotkey at all in the settings for this, but I think my problem is different. Help!

I miss alt-click from SC1, much more useful to me than control groups imo.

Go on to hot keys in settings and assign from there works for me