I'd like to filter so that I only see cards that are not labelled. I can see how to filter for any combination of labels except "only show me those that have no label". I think this would be very useful, but can't figure out how to do it.
You can find cards without labels buy using the
- operator. For example, if you have a label called red and a label called blue and you want to see all cards without a label, try this:
The result will be any card that does not have the red or blue label. Of course you will have to list all of your labels for this to work.
You can use the Trello API not to filter but probably to solve your problem, if you have programming skills. It's not a complicated API to use. https://trello.com/docs/