How to get a snapstop of my PDF in Yosemite Preview without the annotations?

I am taking snapshots of a PDF from preview by using the rectangle-select tool and then Cmd+C. In this way I get the PDF and the annotations (underlines, highlights, ...) that are in the area that I have selected. I remember it use not to me like this in 10.9 and one was getting just the PDF, without the annotations.

Skim seems to still do it the 10.9 way, i.e. without the annotations.

Is there anybody who knows how to get Preview to behave as in 10.9 and current Skim and give me just the PDF, not the annotations?

Any suggestions? Thanks, Roberto