While viewing any page, look for the Edit button in the upper right hand corner of the screen, and click it:
If you're not logged in
You will be asked to authenticate, if you are not logged in. Provide the first part of your @mssm.edu address.
A message will be sent to your email address containing a six digit code. If you are on a phone, you may need to switch to your mail client.
Switch back to the IMA app. You will be asked for the code. If you don't see a place to enter it, you may need to go back to the page you were editing and click Edit again.
Using the editor
You will now be looking at the page editor, which is where you create and edit content for the app.
For further instructions, see Using the Page Editor.