you can do more than that.
say you have a rifle section of 10 men.
You want to have a key to control over all 10 men and you want a key to control the 2 man machine gun pair in that group and you want to control the remaining 8 men as well.
double click the leader and the whole squad will be lit up, press CTL 1.
Then click the machine gunner and SHF click another squad member with M/G ammo, then press CTL 2.
Now click on the leader again and SHF click the other 7 men (NOT THE GUN PAIR) and press CTL 3.
so to move the whole squad press 1 and you can move them, hold ground or whatever. When you come under fire you can then press 2 and move the gun group to a firing position and then press 3 to move the leader and riflemen to outflank an enemy position.
Once the attack is over you can press 1 gain to move everyone to a new position.
W