Did you know you can use the Markup extension to annotate photos on your iPad? Markup may be one of the best hidden gems of iOS 10.2.
Markup is available in the editing menu of your Photo app. Markup allows you to write on your photos, add text, and magnify portions of your photo to call attention to details. Annotated photos are saved in the Camera Roll of your Photos App where you can share them with ease.
Photos Markup - Annotate Your Photos
Additional iPad Tips