Across the internets I’ve found two prominent methods for using an iPad as a graphics tablet in cases without native application support (like Photoshop CS5/6). Both rely on third party apps to stretch your desktop display onto your iPad, but by slightly different approaches. Neither solution will provide the pressure or pen-angle detection that Wacom tablets provide, and their input resolutions are comparatively poor. However, if you’re just hoping to make some simple hand-drawn paths in Illustrator or the like, these are fine solutions.
Considering the factors below, I find LogMeIn to be a much better tablet input solution than Air Display. Both are imperfect, but LogMeIn came out on top.
LogMeIn Free Edition
LogMeIn a remote desktop control service that let’s you control a remote computer from any web browser or an iOS app. Both the service and the related software are free. The premium versions provide more advanced functionality like web-printing but for our and most other purposes the free version is perfect. Although you can use the program from a coffee shop to access your desktop, you can also use it while sitting right in front of your desktop as a tablet input device. You retain full control of