Here is how you can add a binder for your approach plates:
1. Open ForeFlight.
2. Select the PLATES tab.
3. You will see a BINDER LIST drop-down menu at the top (middle). Tap on that - this will bring up the list of Binder you have.
4. Now, tap on the (+) button, and you will be prompted to name a new binder.
5. Type in the name you would like, and select SAVE. This will put you in the binder you just made, so you can start adding plates.
Image 1: Adding a binder to the Plates page.
Video 1: Plates Organizer in ForeFlight Mobile.