Headers are useful to organize long checklists and delineate different groups of tasks within the same checklist.
Creating a header
When a header is created, any checklist items that are created underneath it are assumed to belong to that header (until another header is created).
Click in the Add new item text field and enter the header text. If desired, format your header using the syntax in the table below (remember to add a space between the symbols and your header text).
Click the Add header button on the right.
As a shortcut, you can simply press Enter when you are done typing (as soon as you enter header formatting syntax, the Add header button is highlighted by default).
Converting headers to items
When a header is converted to a checklist item, it will retain all its existing formatting (e.g. heading styles, emojis).
Click the menu button on the right side of a header row.
Click Change to item.
Converting items to headers
When a checklist item is converted to a header, it will retain its formatting (e.g. italics, emojis).
Hover over an item in the checklist and click the menu button.
Click Change to header.
Expanding and collapsing headers
Each header will have a caret beside it, which can be clicked to expand or collapse that section.
Headers can be moved and reorganized just like regular items.
Moving collapsed headers
If a header is moved while it is collapsed, all the items within the header will move with it. All the items underneath a header are assumed to belong to that header (until another header or the end of the checklist is reached).
Viewing header summaries
Each header will display a running summary of how many checklist items have been checked in that section.
Adding items under a header
It is possible to add items directly under the desired header.
Click the + button in the header. A text field will appear: