Shortcut for highlighting text

Hello,

I regularly use the PDF view option in Endnote to read and mark up journal articles in the course of my research. At present, to highlight a section of text I first select it and then punch the “highlight” button in the Annotation Toolbar. I would very much like a keyboard shortcut such as “ctrl+H” or “apple+H” that would highlight any selected text.

Regards,

JGC