I recently mentioned that I use my iPad mainly as a second computer screen, today I'll show you how!
Using the app Air Display connecting your computer and iPad is so simple. You just purchase the app on your iPad and then set both to the same wifi or you can set up your own network on your computer that does not require wifi. Your screens will automatically connect. Having a second screen can make you more productive and allow you to draw directly on the screen, that is how I write on my pictures! I drag my photoshop window over to my iPad and can see exactly what I'm writing on which makes it more clear than using a writing tablet. You can write on your photos using any program that has a brush or drawing capabilities.
Hopefully this small tech tutorial can help you out and make you more productive! Have a great day:)