Timeline

Undo only takes you back one step at a time. It's fine for fixing a mistake, but not for finding the version you had twenty minutes ago before you tried a different idea. By the time you get there, you've probably lost track of where you wanted to stop.

A timeline lets you move through your work instead. Jump to any point in the session, see the page exactly as it was, and continue from there. Nothing is thrown away. Earlier versions remain available, so exploring one direction doesn't mean giving up another.

That's especially useful when you're comparing ideas. You might try three different layouts, headers, or color schemes before settling on one. Instead of relying on memory or screenshots, you can switch between them and decide with the page in front of you.