Click in The Day Plan Input, and write a short & descriptive title.

The edit entry form will show. Select "Start Time" 

Click on "Task" - This will show up in our Task Area

Let's add something to describe this task

The Entry shows in the list below the form, click on "Create Entry Here". Information about that entry will popover above it.

We can further edit this task by clicking the "Edit Icon".

Let's attach a List to this entry, Select "Lists"

Add an Item to the List, and Press "Enter/Return" to confirm

Once your list is complete, Click on "Save"

Here's your Task in the Calendar, click on it.

Click Show Checklist Button to open the checklist.

After viewing, close the entry details popover.

Get Organized Faster

DayViewer

It's possible to create tasks directly from within the Day Plan, this guide shows how.