Hyperbook
Video Director's graphics do interfere with the video when using it in
genlock mode, but the CDTV genlock is controlled by a button the wireless
remote that lets you flip between RGB, NTSC and genlocked pair, so it's
relatively easy to see what you need to in a second; also, VD's menu has
quite a bit of free space, and usually I can see enough of the genlocked
video below it to do what I need; this would be true of most any Amiga
genlock. Obviously, the ability to resize the VD menus would make this
even more effective.