Is it possible to add label colours to several cards at once? Perhaps some kind of select all option?
No, it is not possible to select multiple cards and apply a label to them; you have to add the labels individually.
Using the 1 - 6 keyboard shortcuts can make this easier, because you can add the label without having to open the card or the labels menu.
2Blew. My. Mind. You can also hover and press
mfor adding members Nov 28, 2016 at 0:37
Note that this answer is no longer completely accurate. While bulk update functionality doesn't exist in base application, there are power-ups that provide this. I have been using Bulk Actions Jan 3, 2021 at 15:04
couple this with
Right Arrowfor stepping between issues. Jul 12, 2022 at 3:21
Selección múltiple para Trello is an extension for Google Chrome that can handle what you're looking for.
I have been doing this using the free Trello power-up Bulk Actions. Works great.
1This is the correct answer in 2021, the Bulk actions power-up works really well.– boardtcJan 13, 2021 at 17:02
I've just cooked up myself a tool that helps in these kinds of tasks:
Batch Actions for Trello. It is still a work-in-progress, but it can already add labels to multiple selected cards.