1. Go to Content → All Pages
2. Find the page using the search bar or browse the list
3. Click the page title or the Edit icon
4. Make your changes in the editor
5. Click Save to save as draft, or Update to publish changes immediately

If enabled by your administrator, you can edit pages directly from the front end:

1. Navigate to the published page on your site
2. Click the Edit button that appears in the toolbar (requires editor role or above)
3. Make changes and click Save

Every save creates a revision. You can restore any previous version at any time.