Currently unable to do this; would prevent folks from having to go backwards and type everything back up to go to another board.
Hello @anon68966729
You can do this using the multi-homing feature in combination with bulk selection.
Add tasks to multiple projects
https://asana.com/guide/team/advanced/connect-your-work#gl-tasks-multiple-projects
Bulk select tasks
https://asana.com/guide/team/advanced/save-time-in-asana#gl-multiselect
Best,
Rosario