1. Log into the site dashboard.
  2. Select Appearance > Menus.
  3. Select the menu to edit from the menus drop down.
  4. Expand custom links on the left hand side of the menu editor.
  5. Add the # symbol in the link URL field and enter a link title.
  6. Select add to menu.
  7. Expand the newly added menu item within the menu structure. Remove the # symbol from the link URL.
  8. Save menu.