Under the assistant, Dashboard now shows your latest Notes in Personal or the selected team. Select New note to write one, or select a note to change it. The note opens in a window on Dashboard and is saved as you type. It is an ordinary note in Notes, and Open in Notes opens it there. On a phone, swipe the notes sideways to see more; the last one opens Notes.
Notes, Unread mail and To-dos each have a ⋯ menu with Hide from Dashboard. The section goes at once, and Undo brings it back. A line at the bottom of Dashboard lists the sections you hid, with a button to show each again. The same choices are in Account settings, under Dashboard.