How do I add a submenu?

Login as admin; go to structure-menus; add menu; fill out the form; SAVE!!; Add links; type in the node/# (you must know the node number of the page you want.  To find out the node number, goto content, check page, edit, look at bottom of your screen or in your browser address box for node#);the menu name is <submenu name>.  Be sure it is the angular parens. Creating a (sub)menu automatically creates a block.

You must also edit your submenu block.  Goto structure-blocks-disabled, find your submenu, choose region (say Sidebar A), click configure, fill out the block name (same as the submenu) region (say Sidebar A), check "only listed pages" or "all pages but", type in  node/#.

To put a pdf file (or other file) right in the submenu, you will have to download the file, and give the full pathname.  For a email address as a menu choice you will have to put html code in the path name.  e.g., "mailto:caretakers@hollistonhistoricalsociety.org"