What I finds work best (if not using a third party app) is if you want to post a pic, take a screen shot, crop your photo a little bit and then when you compose a new post/message, see the icons at the top, choose the third last one on the right, select the computer tab, access your photos and select one pic, then upload and wait a sec. Hey presto your photo appears here - it has the words ATTACH at the beginning and end. If you want to make it a little bigger, use the A/A button on the very left where you compose a message and double click on your photo. This will bring up the manage screen. Enlarging pics works easier on a PC rather than a mobile device. Hope that helps!
Originally Posted by Bocconotti