@MikolajBuda How did you get the property to save? I have also overlaid that path in order to add a custom tab to DAM folder properties however the dialog fields within the tab are not being saved to the CRX upon saving the dialog.

The issue is that the client library is not included on the page. I added the client lib as shown below:<sly data-sly-call="${clientLib.all @ categories='core.wcm.components.image.v1'}" />I added this at the page level for testing, however it might be more appropriate to add the client library at a ...