Ruler Units Remembered

A simple change that I think would increase quality of life use for Photoshop. It would be helpful if the document I am working on would remember the ruler units that I set for it. I am a designer that is always switching between print and web, thus changing between pixels and inches and mm quite often — several times per day.

While it's not difficult to go up to the ruler and right-click to switch the units, I think with all the other information PS documents contain, it wouldn't be too difficult for them to remember the unit of measurement that was previously selected for that particular document.