Editing the grid properties in FormSketch - such as removing the grip or selecting the measurement type that you would like to use - can be done with the options in the top row menu.
By selecting the grid icon, you can turn the grid view on or off. By selecting the settings cog, you can open up further grid settings so that you can set up the grid and map measurements to your preference.
In the grid settings you can decide how large you want the area of the map to be, the grid size and pixels per unit, as well as between imperial or metric measuring systems. You can select or deselect the ruler in the grid as well, depending on your preference.
