Index -> Playing the Game -> Planning Phase
During this phase of the turn, you play cards from your hand, use activated abilities, ditch unwanted cards to the Black Hole, issue build orders to your industrial planets, and issue movement orders to the entities under your control. You may do these things in any order you like.
Once you have completed your planning, click the Go Button to commit yourself to the turn. As your opponents do this, a checkmark will appear next to their Player Info Box, telling you who is ready to proceed. Once all players have clicked the Go Button, the execution phase will begin. Be aware that once you click the Go Button, you are committed to your actions and can�t undo or alter your plans.