Tap the top left "Filter" button to filter tasks by tag. This button will only be shown if at least one task with a tag is assigned.
Only the tag assigned to the active task will be shown in the list.
Tap the tag to set the filter. After setting the filter, the filter name will be displayed above the filter button.
Users can clear the filter condition by selecting "All" at the top of the tag list. Users can also select "No tag assigned" to show all tasks which do not have any tag assigned.