On a card, you can click any assignee, milestone, or label to filter the project board by that qualifier. To clear the search, you can click the same assignee, milestone, or label again.
You can also use the "Filter cards" search bar at the top of each project board to search for cards. You can filter cards using the following search qualifiers in any combination, or by simply typing some text you'd like to search for.
- Filter cards by author using 
author:USERNAME - Filter cards by assignee using 
assignee:USERNAMEorno:assignee - Filter cards by label using 
label:LABEL,label:"MULTI-WORD LABEL NAME", orno:label - Filter by milestone by using 
milestone:MY-MILESTONE - Filter cards by state using 
state:open,state:closed, orstate:merged - Filter by review status using 
review:none,review:required,review:approved, orreview:changes_requested - Filter by check status using 
status:pending,status:success, orstatus:failure - Filter cards by type using 
type:issue,type:pr, ortype:note - Filter cards by state and type using 
is:open,is:closed, oris:merged; andis:issue,is:pr, oris:note - Filter cards by issues that are linked to a pull request by a closing reference using 
linked:pr - Filter cards by repository in an organization-wide project board using 
repo:ORGANIZATION/REPOSITORY 
- Navigate to the project board that contains the cards you want to filter.
 - Above the project card columns, click into the "Filter cards" search bar and type a search query to filter the cards.

 
Tip: You can drag and drop filtered cards or use keyboard shortcuts to move them between columns. For more information about keyboard shortcuts, see "Project boards" in "Keyboard shortcuts."