Click the Walkthrough button at the top of your site editor. It replays the guided tour anytime you want.
For a fuller checklist, click Do This First in the menu on the left. It walks you through the main setup steps and stays there forever. Nothing bad happens if you go back through it or redo a step.
There's also a search at the top of the site editor. Click it, or press Ctrl+K, then type what you're looking for, like "hours." It finds the right setting for you.
Why this matters
The editor has a lot of tabs. The tour, the checklist, and the search all help you find what you need without hunting around.
Related questions
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