How to Use History in Photoshop

Opening the History Panel

Go to Window > History. The panel starts with a single “Open” state and adds a new line for every action you take: a new Hue/Saturation adjustment layer, a change to its sliders, each stroke of the Spot Healing Brush. Aaron demonstrates by saturating the greens in a landscape and removing a few boulders, and every step shows up in order.

Going Back in Time with the History Panel

Click any earlier state in the History Panel and the document jumps back to exactly how it looked at that point, all the way to Open if you want. Click a later state to return. Think of it as a very advanced undo and redo where you can see every step and jump straight to the one you want instead of tapping Undo blindly.

New Document from a State

The first icon at the bottom of the History Panel creates a new document from the current state. It’s a quick way to make a duplicate of your file at any point in its history, and you can do the same from a snapshot.

Snapshots for Comparing Versions

The camera icon in the History Panel saves a snapshot of the current state at the top of the panel. Every file opens with a default snapshot, and you can add as many as you like. Aaron makes one after the saturation edit, adds a warm Color Balance layer to fake a sunrise, and snapshots that too. Clicking between snapshots flips instantly between versions, so you can compare color treatments without toggling stacks of layers.

Undo, Redo, and Keyboard Shortcuts

Most of the time you’ll move through history with Step Backward and Step Forward from the Edit menu rather than clicking the panel. Edit > Keyboard Shortcuts lets you assign whatever keys you like to both, so set them to something your hands already know.

Add More History Panel States

In Preferences > Performance, History States controls how many steps Photoshop remembers. Aaron keeps his at 100; the maximum is 1,000, but every state is held in memory, so going higher can slow things down. And remember that layers are the better safety net: if you build edits on adjustment layers and new layers you can toggle them off instead of undoing.

Quick Reference

• Window > History opens the panel; click any state to jump to it.
• Camera icon saves a snapshot; click snapshots to compare versions.
• New Document icon duplicates the file from a state or snapshot.
• Edit > Keyboard Shortcuts to customize Step Backward and Step Forward.
• Preferences > Performance > History States — around 100 is a good balance.