
If you hold Shift+Control, you can left-click a unit icon in the command bar to remove that unit type from the selection.If you hold Shift, you can left-click a unit icon in the command bar to remove all other unit types from the selection.If you hold Control, you can left-click a unit icon in the command bar to remove a unit from the selection.

This can be combined with double-clicking

These are pieces of information that I've found out through my own research or heard about (Credit to ZeroEmpires, Resonance22 and SpiritOfTheLaw on youtube!) during my work on this guide, but that don't fit anywhere on the sheet itself. In addition to the info sheet, here you can find all manner of interesting and/or useful information on the mechanics of Age of Empires II
