Doodlepad (rev. 16 or later) can also be scaled to whatever size you like.
Doodling with the various default colors in Doodlepad.
The storyboard is where you do all your managing.
The map selector can be used to select an instance map to replace the normal white background.
If you wish, you can even select only a specific portion of the map to be displayed (as shown by the purple rectangular selection in this image)
A random doodle of a fight, drawn on top of an instance map, zoomed in to show only a specific room in a raid instance.
Doodle in Doodle Pad Mode!