1. How to remove links between cards from the Links Tab?
The Links tab of the card not only helps users to create new links and associate already existing cards but also allows them to easily delete links.
1.1. To unlink cards -> open up one of the related cards and go to the Links tab.
Use the Delete links button (Image 1), to activate an additional panel and select/checkmark the cards' links you want to remove.
1.2 In case that a user wants to unlink a particular card, just right click on its representation in the Links tab panel and use the Delete links function.
Note: this action will not delete the cards themselves -> it will remove the links between them only.