How do I determine the right screen size?

Check out this great tool to validate your image sizes before uploading and testing on your iOS device. You can also check out this site for popular device image sizing. 

You’ll need to edit your images using an external image editor (e.g. - Omnigraffle, Adobe Photoshop, Pencil Project, or Microsoft Paint) prior to uploading your image files in InVision.

Getting Started: General Questions (