I'm ashamed to say it took me 2 days to figure out how to rotate an image in Instructables. I'm making this so I remember how to do it again, and you'll know how to as well. LOL.
Step 1: +Add Image
Click browse to add your image.
Step 2: Rotate!
You'll notice this image is in need of a-rotating. Click the little circular arrow thingy by it and viola! Rotated image.
Enjoy posting your tutorials.