Grid/Surface Color

Click on the Selection Box button in the main toolbar. By left-clicking on the workspace and dragging a box with the mouse, you can select a wire grid or a solid surface, as explained in Modifying a Grid/Surface or Modifying a Group of Wires. All wires inside the selection box will be highlighted in light blue.

Go to Edit > Wire Color in the main menu to change the color of the selected grid or surface. A dialog window will be opened where a color can be chosen. There is also a button on the toolbar with the Wire Color command. This command is enabled when a group of wires, a wire grid, or a solid surface is selected.