You use this command to update a surface document file with changes that you have made after opening it in Wintrack.
To save a surface document to disk under a new name you use the Save Surface Document As command. When attempting to save a surface document that you created using the New Surface Document command, you will be automatically led to the Save Surface Document As command. Use the Open Surface Document command to load surface document files from disk. The Surface Properties command let's you change the color scheme and the scale of the active surface document.