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It would be easier to refer to a card using the card number. I see that when you open a card, it shows a number at the bottom right. Is there a way to see this number when the cards are shown on the board. Also, does a similar functionality exits on the Android app ?

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You could manually add the card number to the title of the card, but it doesn't sound like a very convenient thing to do. – Zoot Nov 27 '12 at 16:59
Can you reproduce the results of sirthomas? – Jacob Jan Tuinstra Dec 6 '12 at 18:32
up vote 6 down vote accepted

I don't think there is a way to display card numbers from the board view. You can suggest this feature at feature-ideas@trello.com

A quick workaround for this until there is a solution is to hover over the card title in the board view. The URL preview provided by the browser (e.g. in Chrome the URL preview of the link is at the bottom left of the browser) will show the card's link. The number at the end of this URL corresponds to the number of the card.

Not a great solution, but the only way to see the card number without actually clicking into it.

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You can use this bookmarklet.

I'm going to create some Google Chrome Extension in near future.

But this bookmarklet is very simple fast solution to show card numbers on each card.

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Looks like you might get your wish ... card numbers just showed up on my Trello board. Not sure if it was due to some funky filtering I did, or if they just pushed an update. Either way, I'm looking for a switch to toggle on/off, otherwise it just adds more clutter in cases where you don't need them.

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Thanks for sharing! Your share however, doesn't fitt the criteria of an answer. Read the faq section to figure out why. – Jacob Jan Tuinstra Dec 6 '12 at 18:30
Is there a setting? I cannot see any numbers – advantej Dec 6 '12 at 21:52
And... they've disappeared again. – Paul Lammertsma Apr 4 '14 at 13:17

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