Scourge of War Boards

I would like to know the difference:

[Ahideunit]: 'hide' in logic mode units in the scenario (but they 'exist' in the RAM of the PC). What do (?) Is oriented in line in front of the enemy (?) Are in 'Tcommon' (?).

If this is true, is not better 'delete' units which do not serve in the file [scenario.csv](?)
So the PC's RAM is not to be occupied by anything.

It is MUCH better to not have units in the OOB that you do not use nor need in the battle.