So how do I do that exactly?

Item Details

Item Details allows you to provide in depth information about how or why a particular Item on the checklist is done.

Details can be hidden in a Pop Up menu to be referenced when needed or made to be always visible on the screen before or after the item.

Add additional details to your Item by Clicking or Dragging the "Details" block from the Resources panel in the sidebar.

This will prompt you where you want the details to be placed against the item:

After selection a position you will be be taken to the Editor where you can document your additional details.

You can remove Item Help by clicking the Cross at the end of the row.