I have been using Photoshop/Illustrator for about 6 years or so now. I never really learned from official resources, nor did I attend a course which would have taught me how to use the Creative Suite appropriately. But it bugs me more often than not, so I finally want to learn how to achieve the following:
I am an Interface designer and sometimes in interfaces it happens that views repeat throughout the application (like the cells of a custom table for example). I would like to learn how to "link" layers either in the same document, or externally. I know it is possible because I have often seen it in other people's psd files, like product mockups where you can change the content's layer and as soon as you save it, it will update all interface elements that use this 'linked' layer.
I would be grateful if somebody could shed some light on this topic.