Created attachment 144760 [details]
screenshot showing transparent images in dolphin without file dimension border

In Dolphin transparent images and file formats which support transparent thumbnails do not have any indication about their file dimensions. They just show empty area around them. User has to guess the empty area between files while doing a drag ans select operation. 

Jpg and other formats have nice shadow around them, but transparent images do not have this. while this is inconsistent On vdg room I understood that this is done to avoid ugly rectangle around icons. Having rectangle border around icons would be odd and look ugly, I think there should be some indication of the image area. 

Looking at macos and windows I see that they show a box around the element on hover. Macos shows name and element in separate highlight box on hover. Our own app gwenview also has this feature , it shows a blue box around the file dimension on hover. I think having this box on hover would solve this issue of user getting confused about the file dimension boundary.

I am attaching a screenshot of a scenario where I have few transparent png images. Often common case when you render animation as png sequences. You can see that it becomes hard to know where the image starts and where empty dolphin window is to start a selection drag and not drag the image itself.