HOW TO COMPARE HISTORY STATES AS DOCUMENTS
Since my scheduled blog is not quite ready, I am posting one I did previously on my Tidbits Blog. It is a tip I find personally very useful, especially when painting and I want to see what my original image (history state) appeared. I am finding this especially helpful when adding highlights and shadows to areas that are not obvious they needed a little extra attention. So here we go with an “oldie-but goodie” from a few years ago.
Well once again I learned another little tidbit this week that really surprised me because basically I had never thought about it! Photoshop allows you to create a document from an earlier History State by just clicking a state you want to look at again, and dragging it down to the bottom of the History Panel’s left icon called “Create New Document from current State.” It will open up another window with the image as it appears in the older state. Below is an example of a photo I am currently adjusting where a Topaz (see my Tidbits Blog sidebar for website link) Adjust Portrait Drama preset was applied (I know it is a landscape type image but it works!) and then a Nik Color Efex Pro Tonal Contrast filter was applied next. I wanted to compare the later combined filter state to the earlier Topaz Adjust only state. Pretty cool, huh? There are those times when you just need to compare something you did before and this is perfect! Remember though, that you lose your History States when you close out of Photoshop so save that extra window if you want to keep the image for comparison.
This is me back again. Also, by setting up your window to be tiled like above, you can zoom in to the same area at the same amount by following these quick steps. Go to Windows -> Arrange -> Tile and then Windows -> Arrange -> Match All. Choose the Hand Tool (also can use the SPACEBAR to active the Hand Tool) or the Zoom Tool (CTRL or ALT+SPACEBAR), hold down the SHIFT key and click in or drag an area in one of the images. The other image is magnified to the same percentage and snapped to the area you clicked. Usually I do not need this all the time, but sometimes it is helpful to zoom in on an area. Below is an example of how I am using the windows feature for painting – the smaller image that was set to the original state of the image when opened was set to Float to Window and the zoomed in image was still set as tabbed in Photoshop. They are two different documents still and the small one can be enlarged at any time.