Drawing Grid
Click the View | Show/Hide | Grid command or the 
button or right-click on the plot window and click Drawing Grid to toggle between showing and hiding a grid which is superimposed over the plot window. The Grid command button is depressed to indicate that the grid is displayed. Surfer will remember your preference to have the drawing grid on or off when the program restarts.
The drawing grid is a series of evenly spaced dots, similar to graph paper, which is used to help align objects in the plot window.
You can control the number of grid divisions in a page unit by clicking File | Options and clicking on the Rulers and Grid page.