If you're working with a template that links to ASL Signbank as an ECV and you want to type in the annotation field where the ECV is linked (usually the right and left hand ID gloss tiers), you usually need to "toggle". That is, when you first create an annotation field and tap on the entry to type, you will see the full list show up like this:
You'll need to either right-click on the list itself to select "toggle suggest panel" or you can simultaneously type "command" and "u".
You will then see this empty box.
You can then type in what you want then choose it from the list and click return.