• Command + Z (Mac) | Control + Z (Win) will toggle undo/redo of the last command.
• Option + Command + Z (Mac) | Alt + Control + Z (Win) will step you back through history.
• Command + Shift + Z (Mac) | Control + Shift + Z (Win) will step you forward through history.
To change the number of history states (multiple undo’s) that Photoshop keeps track of while an image is open, select Preferences > Performance and enter a value for History States. Setting a higher number (100 for example) will save more changes, and allow you to step farther back in time, however it will also require Photoshop to keep track of more information in RAM (or, when all of the RAM is in use, using the scratch disk). Making large changes to the entire document (adding layers, running filters etc.), requires keeping track of more history than smaller changes (such as small, localized strokes with the Healing Brush). Therefore, if you increase the number of states and notice a performance hit, trying lowering the number again.
You can also manually set the Cache Levels and Cache Tile Size in the Performance Preferences. If you use relatively small files—roughly 1 megapixel or 1280 by 1024 pixels—and many layers (50 or more), set Cache Levels to 1 or 2. Setting Cache Levels to 1 disables image caching; only the current screen image is cached (however, you may not get high-quality results with some Photoshop features if you set Cache Levels to 1). If you use files with larger pixel dimensions—say, 50 megapixels or larger—set Cache Levels higher than 4. Higher cache levels speed up redrawing.
For whatever reason, I thought that if you merged two Lightroom catalogs you would lose the History states from the images that you had made adjustments to in the Develop module. But it turns out that you don’t! So, when I work on location with a location catalog and make change to my images in the Develop module, when I return home to my master catalog and choose to “Import from Another Catalog”, all of the History states from the Develop module are available. I have a feeling that this is not a new feature, just one that I didn’t know about.
In this video Tutorial (Adding Special Effects in Lightroom 5), Julieanne explores the best way to convert images to black and white, as well as add tonal overlays, edge effects, selective coloring and film grain textures. Then, you’ll learn how to apply those effects to multiple files using Sync options and Presets.
In this video tutorial (Create Stunning Images), Julieanne demonstrates how to create the highest quality photographs by removing lens distortion, cropping, correcting perspective, and making color and tonal corrections in Lightroom’s Develop module.
In this episode, I will demonstrate how to streamline Lightroom 3’s Develop module by taking advantage of my top 10 favorite shortcuts & time-saving features in order to eliminate many of the repetitive image adjustment tasks when editing large volumes of images.
In order to keep a record of commands applied to a file in Photoshop, select Preferences > General and turn on the History Log. You can choose to save the logged items to the metadata (inside of the file), to an external file or to both as well as select a level of detail to record:
• Sessions will only record a minimal amount of information such as when files are opened, saved and closed.
• Concise will record the name of the command (such as Levels or Curves).
• Detailed will record the name of the command and the settings applied (such as Levels, Input: 0, 197, Gamma: 1.48 etc.)