How about a start at cursor button?
How about the ability to start at an inserted bookmark (Maybe an alt number)? And ask if you want to set a bookmark (removing the old one).
How about a menu item to link you to a working dictionary so you can fix funny pronunciation, since the dictionary is there anyway? (The dlls to make it work are available on the internet.)
Finally, how about making the text size resize all text in the window without selection, since you're not so likely to use the program to edit text.