Thanks! The original goal of this was to make printable maps really easily, so I haven't focused too much on interactive stuff like character tokens or fog of war. However, you can easily add your own stamps (there's a button at the end of the list, or if you click the current stamp, there's a big button on the popup), and stamps are easy to drag around, so that could be a solution for you there.
In regards to the dice, do you mean an actual dice roller, or just stamps of different dice?
In regards to the dice, do you mean an actual dice roller, or just stamps of different dice?