

All your units or structures that are within this frame will be selected as soon as you release the mouse button. You will see a frame following the cursor. To select several units or structures, left-click on any other place on the map, then hold the mouse button down while moving the mouse. 3.1.2 Selecting Several Units or Buildings To cancel the selection of a unit or a building, click on any other place on the map with the right mouse button. To select a unit or a building, click on it with the left mouse button. You will find a complete list of hotkeys under 3.1.18. There are hotkeys available for the most frequent or important actions.

You can control the game with the help of the normal two-button mouse.
