Problem resolved. Seems there is a separate menu for the theme which I didn’t see before. Ticking or unticking it changes borders for all the images uploaded and for future uploading.
I don’t know any languages which puts me in a difficult position 😛
Any example chunks of code that would display the result I need?
Ok, so I’ve discovered I can export images with hotspot slices and I’ve recreated the header I want with linked slices. It’s exported a html file and a few logo related files but I have no idea what to do with them to get them into my header.
Ah, I see, my theme gives it the name navigation instead of header. It’s working now, thanks.