Menu settings missing from all node edit forms
"Menu settings missing from all node edit forms"


You need to enable the menus for use on each content type. This can be achieved on pages via Structure->Content type->Basic page, then click on the "Menu settings" vertical tab and toggle which menus should be enabled.

Also, if you're using the revisioning system in core, or any kind of workflow type module (workflow or workbench), unpublished pages in the menu won't show up in your list of menu items in Structure->Menus->Main Menu (for example), as well as the obvious rendered menu on the front end too.