I understand that I can add an admin link which links to a page generated by a specified function, but I just want to link to a URL (not a page generated by a function). Specifically, an Edit view of a particular page. So the admin menu link will essentially take you to Pages –> [Page Name] –> Edit. Is there a way to do this? I couldn’t find it here: http://codex.wordpress.org/Administration_Menus
Thanks for the help, OldRiver. This is sort of what I want. But instead of adding a link to the admin bar, I want to add it to the admin menu, the vertical menu on the left-hand side in the wordpress backend. Apologies for not explaining it correctly.
You were on the right track with Administration Menus, but you needed to dig a bit deeper. See Function_Reference/add_menu_page. In the parameters section you can see if you provide a $menu_slug argument that is a PHP file and omit the $function parameter, that PHP page is displayed when the menu option is selected. Many of the default admin panels work this way. Sub-menus have a similar setup.