is there a shortcut key combination to initiate download of pdf viewer

• Select a website link for a pdf document in Safari
• Separate tab in Safari opens
• Once the document is displayed, move the mouse pointer towards the bottom of the pdf, which causes a small window to be displayed with four options, the rightmost option is a downward pointing arrow in a circle to download the file.

Wondering if there is a shortcut to initiate downloading the file without using the mouse.