@Gerhard & @Martin: Want to add a few notes to this for your reference. Herbert123 is right. Linked layers are essential and quite useful in many scenarios. But PS never went the full length of the logic. In PS, linked layers transform together; but barring that, nothing else is linked. Opacity, blend modes, layer styles, colour filters and pixel content are not linked, and can neither be linked nor unlinked. Affinity Photo got this right. See the screenshot to see what I mean. In AfPhoto, you can link and unlink any of the properties for any number of linked layers, allowing for simple really elegant and economic operation. In the attached image, transform and opacity & visibility are linked, but not any other attribute. This is likewise true for EVEN adjustment layers. As I said, this is is extremely useful, as you can link several different adjustments, link their adjustment parameters, unlink their opacity, link their colour filters, and unlink their pixel content and so on. This opens up infinite possibilities. Combined with actions, there are no limits to what can be done!
Furthermore, not only is the dialogue box non modal, it allows the user to even drag objects from the layers panel into the link panel to create links directly.
Linked Layers.jpg
You do not have the required permissions to view the files attached to this post.