How do I add my own pages, folders or apps to the sidebar?

With the + next to Home. Whatever you add there sits directly under Home as your pages. You can choose “New page”, “Tasks”, “Dashboard”, a group (folder), “Add existing” for apps or Work, Discover and Connect, an external link, a separator and “Save this page” for the page that's open right now.

1. 01If the sidebar is hidden, open it with the sidebar icon at the top left or ⌘B.
2. 02Click the + next to Home.
3. 03Choose what to create. “New page” has two columns you lay out freely by drag and drop.
4. 04To add something under an existing entry, use the + on its row or “Create inside …” in its ⋯ menu.