Not familiar with drumgizmo so not sure what that refers to. Maybe the manpage has info on it. If there is a man page available you can access it in the terminal:
Then you can search the manpage by pressing the forward slash (/) and then your search term ('input engine' in this case) and hit enter. If there are multiple results you can use the 'n' key to jump to the next entry. Scroll the document using arrow keys or the page up/down, home/end keys.