Add optional markings to grid

[hobnob]

Some tiles have a marking (such as '1' to read a passage from the scenario book). It would be useful to have these markings available to view (probably as an option on/off)

We could implement the options in the settings, and then the marking could be a form of overlay

[hobnob]

An alternative to this is to allow the adding of markings... mayve a special overlay piece that lets players set the letter or number of the marking as well as laying it

[cafelizardo]

I was going to create a new suggestion asking for the doors to be labeled to match the snenarios described in the book which is a duplicate of this.

Another suggestion is to overly the entry and exit hexes.