I can't remember if there is a better way off the top of my head, but you can control the number formatting pretty well if you do it manually, like in my simplified and overly verbose example here:

MACRO TTT
GV a 1/7
GN b a*100
GN c a/100
GV d a-c
GN e d*100
GL out Your values
APND out 
APND out Original: 
APND out a
APND out 
APND out Formatted: 
APND out c
APND out .
APND out e
APND out m
MSGBOX Message;out;
ENDM

This bitmap isn't really intended to be used as a main background, rather it is meant to be used with drawing tools to draw patches of heath on top of your terrain background.

One limitation with CC3+ is that fills can't be categorized. So the background fill picker in the new map wizard will simply show all the bitmap fills available in the map, it has no idea which fills are suitable and which are not.

While not the most advanced debugging feature in the world, you can issue to the STEP command to help debug a macro and see what is going on. It will show you a message box for each line run with the variables expanded so you can see exactly what is being called.

It can be turn off again with NOSTEP

The viewer was discontinued a while back. Because most maps in modern CC3+ are based on raster artwork requiring external art files, the viewer wasn't able to display those maps without also having the same artwork available, so it no longer had the utility it used to have.

If you wish to let non-CC3+ users see your maps, I recommend just exporting them to an image or printing them to a pdf file, this is the best ways for people to see them without having to own all the artwork used.

Looks like there is a corruption with one of the grids.

Try this:

• Save the map
• Delete all the grids one by one (You won't be able to delete the standard XXX ones)
• Close the dialog
• Save the map
• Now try adding the grids you need one by one. I recommend saving the map after each.