Next time you upload a photo on Facebook via the iOS or the Android app, you'll see a "Doodle" option at the bottom right next to another fun feature called Stickers. It's identical to the doodle icon you see on Messenger when you attempt to send an image, giving you an easy way to scribble and draw on pictures before uploading them to your account. You can choose colors by tapping the rainbow slider at the edge of the display and adjust the width of the pen by dragging a finger from the slider towards the middle of the screen. We don't see a new update on iTunes or Google Play, and we didn't have to download and install anything to get the feature either. You'll likely just find the button on your app these coming days as a nice surprise.