# VASSAL Reference Manual Home > Module > Map > Board > Irregular Grid
## Irregular Grid
An irregular grid is used for area-based games. It allows you to define a set of named regions at arbitrary locations. When moving pieces on a board with an Irregular Grid, they will snap to the nearest region location. Draw region names: If checked, the names of the regions will be drawn on the map. Font size: The font size used to draw the names. Define Regions: Hit this button to bring up a window for defining the regions. Right-click anywhere on the board to add a new region, or right-click on an existing region's name to change its name or remove it. |