All atoms to calculate and display the molecular surface color-coded by its curvature. More fundamantal to Grasp is the electrostatic potential. This will just create a grid of potential values in a box encompassing the molecule. After having done the calculation, Grasp changes the color coding of the surface to be according to the surface potential. The various objects constructed can also be colored by the user.
Some functions require typing a command.
You can do it when the cursor is in the graphics window and not in the text window - just start typing. If your display shows only atoms or bonds, nothing visible happens. All of these coloring commands can be supplemented by selections, separated by commas. Listing selections consecutively, separated by commas performs an and operation.