An i-model is a package that contains a model as well as related documentation. The i-model Index screen makes it easy to either enter into the model using a saved view or view the embedded documents in the i-model. On this screen, you can set an i-model as a favorite, which adds it to your Favorites list and stores it on your device for offline use.
Note: If you would like to bypass this screen and go directly into the model, change the Open File Directly option in the settings screen.