At the top of each checklist or task page is the bar where the name of the checklist/ task is shown followed by an arrow. If you wish to quickly switch to a different checklist simply:
Note: this is for switching between checklists only. Not tasks.
- Click on the bar where the name of the checklist/ task is shown
- Select the checklist you wish to switch to from the list
- You are now on the select checklist page