Hi guys,
I just posted a new tutorial that steps you through the process of adding a custom quick-action to asset cards in the DAM: https://medium.com/@theopendle/aem-adding-a-touchui-quick-action-to-asset-cards-910b09d499d2
In the example give, you will learn to add a custom quick-action that copies an asset's URL to your clipboard:
As always, if you have any feedback, please don't hesitate!