I build outdoor stages by stacking scaffold uprights on top of each other and connecting them together. All of the uprights are based on .25 meter increments except for some that are in 8 inch increments. When I use the 8 in uprights, they are on top of the .25 m uprights. It can become difficult to differentiate between them.
It would help me quite a lot if I could select all x assemblies, for example, and turn them blue until I'm done building the stage, when I can turn them back to their original colour.