Were you wondering how to change your steam settings to open a game in windowed mode? So was I. Here’s what I found. It’s a 20 second video from Portalzombies on YouTube showing you how to do it (super easy). Basically, you just right click on your game in the Steam Library and choose properties. Then, you click on the “Set Launch Options…” button and type “-windowed” in the field (minus the quotation marks).
-edit: This doesn’t work with Planet Side 2. It crashes the game.