Battle position change
A monster's battle position can be changed in one of two ways: manually or by card effect.
A manual battle position change can only be performed when the game state is open during your Main Phase. It done by changing the battle position of 1 monster you control.
Each monster's battle position can only be changed manually once per turn.
You cannot change the battle position of a monster manually at the same turn it was Summoned, Normal Set, or declared an attack (even if the attack was negated or canceled due to a replay).
You cannot change monsters to face-down Attack Position whether manually or by a card effect,[note] face-down Defense Position monster are always flipped when changed to Attack Position. This change is called Flip Summon when it's done manually. If monsters are sent from the face up battle position to set by card effect they can not be manually flipped summoned that turn.
Notes
^ Except with the effect of "Darkness Approaches".
