Thanks for reaching out about Collections in Trello!
Right now, Collections live within a Business Class team's main board page and there's not a way to move them into the Trello side menu on the left. I think this would be a great to be able to view Collections and have access to them from lots of other places within Trello!
I'll register your question as a suggestion, because I think it could be helpful, too!
If you had to thrive a new habit during a lockdown, what would it be? Trello
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