As of right now, I'll hotkey like this.
1 main army
6((q)) any unit I'm using for drops
However I'm still finding myself to be over saturated, not making enough units. Is the saturation for terran much easier than toss? Perhaps I'm making too many scvs or keeping too many mid game? Lastly, what are some tips to splitting the army? As of right now, I'm constantly running in with a ball of bio, like I'm still protoss, haha.