Is there a keyboard lock hot key?

I am unable to enter any new text or click anywhere in the structure view of the existing or new FM documents. I can enter a new element and have access to all portions of the toolbar. I have verified Hypertext is in editable mode. I have normal functionality in all programs other than FM. I am working with Structured Authoring in FM12. I am just trying to figure out if my cat found the hot key. Any help would be appreciated.