I often find myself doing the same thin twice in Capture. E.g. setting Plot and Screencolor. I usually use the same color for both and I miss a simple button, that lets me quickly assign the same color to screencolor and Plotcolor. A bit like MA's Fixture and Channel ID system where I have an option in both menus to set to same as the other.

Another example for this would be the Unit and Channel numbers, I think it's even more important here, since these two colums are so important for import/export with other software.