You can now select all cards of any particular stage of a Pipeline and perform several actions like assign agent, assign drip, move, archive, mark as won or lost, or merge.
To view the enhancement:
Navigate to Pipeline Manager
Select a pipeline
Click on the check box beside the stage name
You will find all deal cards of that stage will be selected
And the number of cards selected will be mentioned on the top right.
Once selected you can perform any actions mentioned above.