Let's say you have a daily to-do list and are using the essential/bonus sections to split up your day. You then want to only put the "essential" tasks into the jar to work off. 

To do this, filter your list first by the essential section. And then click the jar. 

Filtering by section

To quickly filter by a section, just click the section header. 

Filtering by label or project/category

Hold the shift key down while pressing on  label or #tag underneath the task title (is using category context ) to filter by a label or parent.

Other filters

Use the filter icon at the top right of the list to get lots of other filter options. 

By first creating a Smart List and then filtering by it you can filter you list by virtually any attribute. 

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