The LabWindows/CVI development environment Color Tool is often overlooked, but can be used to modify colors of the Workspace window, Source window, Standard I/O window, Variables window, Watch window, String Display window, and Array Display window. Using the Environment Color Preference dialog box you can change the color of an item or syntax indication in the list using the color pallet. To access the Environment Color Preference dialog box select Options»Colors.
If you want to reduce visual clutter in your code, add things like the ErrChk macros to the User Defined Tokens for coloring (found under the editor window Options). Lighten the color a bit more using the dialog above. It makes the more important content easier to spot in your source code. You can also include things like session and panel handles.