I make an intensive use of objects and labels, because i often need to make series of similar plots with common objects and similar formatting. Labels and objects allow me to do some kind of formatting over the plots (labels with name of the document, name of the plot, number of the plot, etc..). I would find very useful if I could do the same with images, so one could put the same image (i.e. logo) in every plot.
I know there's already a plotting style for images, but this would be a totally different approach, and would let you put repetitive images in subsequent plots. And btw, the image plotting style is unuseful if you need to put a logo outside the plotting area.
The instruction would be something like this:
set object image "filename.png"
Thanks and best regards