Originally Posted by Guyus Germanicus
To get rid of line gaps in my initial disposition, I put the phalanx units in standard formation and then press the '=' key to get the line to widen. Each '=' keystroke widens your unit's formation, and makes it more shallow at the same time. Each '-' keystroke, thickens your unit's position narrowing the unit's facing while increasing its depth. I'm not sure if those two keystroke functions are widely known by RTW players. But they've been very useful to me.