This dialog allows the text mode in the Map Edit Dialog to be
configured.
The Current Mappings show you which tile (only as a number, sorry) has
been mapped to which key.
Select the character you wish to map with the Key drop down list and
the tile you want to map it to in the Tile. Then simply press the
Set button to set the mapping, or Clear to remove the current
mapping for the selected key.
The Set/Next Both button sets the currently selected key to the selected
tile, and then moves both lists onto their next entry. This is handy for
setting up letters and numbers quickly (assuming the tiles are in the right
order).
The Set/Next does a similar job, but only moves the selected key onto the
next value.
The Clear/Next clears the mapping for the currently selected key, and
then moves the key selection onto the next key.
Clear All clears all mappings.