I have been using Adobe Photoshop for many years, but its the first time for me to wonder about the ruler tool. I use it quite often to make measurements on the image that I am working on, but I know I can only have one measurement at a time, but I am just wondering if it's possible to have the old measurement in place, while adding a new one for direct comparison without having to remember the values. Does anyone know if that can be done?
I am using Photoshop CS5.