@Ummar Farooq do you mean select multiple cards to move them to another board? The simplest way to do this is just to create a new list, move cards to it and then move the list. This is a question I've seen pretty frequently so I created a quick article about it:
Hello Community! My name is Brittany Joiner and I am a Trello enthusiast and Atlassian Community Leader. I'll be sharing with you a series of videos with my top tips on how to best use Trello...
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