I want to control which form the user sees when they click the blue add button. The form I want already exists in my app I just want it accessible from here.
You will need to hide the system generated action and create a new action of type “go to another view”. In this action you will set the formula that will be an if(), ifs() or switch() to control which view the user is taken to.
For example using the screen shot in your post:
If I want to take the user to Form A when the confirmation is below or equal to 100 and Form B when it is above 100 my formula would look like this:
if( [Confirmation Number]<=100, linktoview(“Form A”), linktoview(“Form B”) )