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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.

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up vote 2 down vote accepted

Sure it can. Click Analysis>Record Measurements Now you get a Measurement Log at the bottom of the screen. Use Ruler tool to make a measurement, then click Record measurements in the Log, make a new Ruler tool measurement an so on. You can remove specific columns by clicking them and then clicking the little Trash icon on the right hand side of the Log.

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