How do I upload photos?

In the App

Tap the + icon in the bottom right portion of the screen. That will pull up the iOS selection screen and off you go. Uploading.

Other Apps

You can upload to Glass straight from other apps. Anywhere you can use the iOS Share Sheet, you can upload to Glass. Just select the Glass icon from the Share options, and it’ll bring up the Upload screen where you can write your caption and select Categories. This works great from Apple apps like Photos or Files, or editing apps like Darkroom or Lightroom.