Map Properties

The Map Properties dialog opens if you select New Map or Edit Map from the File menu.

Arrayed down the left side of the dialog:

Name: this is the map’s title and can be seen in the title bar and Select Map dropdown. Selecting a map image sets the map name to the filename of the image.
Cell Type: Square, Hex, Isometric or Gridless.
Distance Per Cell: this is how many arbitrary units each cell represents. For the typical fantasy RPG a value of 5.0 would be 5 feet per grid cell.
Pixels per Cell: this is how many pixels each cell should cover – the default is 50. This is most important for scaling to map images you downloaded.
Vision Distance: This indicates how far, by default, a character can see on the map if nothing else is constraining his vision.
AI Cell Rounding: When using the AI option for token movement this setting controls how rounding is done when passing over areas with Terrain Modifiers.
Light: Sets the Light level of the map. Same function as the Map -> Vision menu option.

Map Images

Three buttons on the upper right:

Background: Choose a background color or a texture that will be repeated across the map.
Map: Choose a map image that you may have downloaded or created yourself in a map creation program or paint program.
Fog: Choose a color or a texture to use for the Fog of War feature of MapTool.