My players and I are a little unclear whether taking cover is a reaction, or something that needs to be undertaken on your turn.
In one of the text boxes in the combat section, whether it mentions that some actions fall out of initiative order, it lists taking cover as a reaction; in the cover section itself, however, it mentions that it needs to occur BEFORE someone begins shooting, and can't be done reactively, like blocking.
What is everyone else's interpretation of this?