To create a new Checklist, go to:
Dashboard > Content Editor > Build new content > Checklist
Name the checklist and select the language then click Create new checklist. You will be directed to the authoring tool for creating checklists.
Each checklist consists of an Introduction and checklist items. List as many items as you wish by clicking on + Add checklist item on the bottom of the page. The checklist items can be split and organised into sections by clicking on + Add checklist section on the bottom of the page.
You can also add Content Card to each checklist item, by clicking on a document icon next to the item.