I am working with a template that was sent to me in ID 5.5. Unfortunately, there seem to be headers and footers on each page of the document that I cannot edit or delete. They do not show up in my layers and I cannot make them respond when using the selection or direct selection tool. How do I get rid of them?
The items in question may be on a master page. Check the Pages panel. Double-click a master page in the panel to go to it. Then the items on it will be selectable, but if you delete or otherwise change them, you'll be affecting all the document pages to which the master is applied. To select a master page item from a document page, (hence affecting only the current document page), override its master status by Ctrl+Shift+Clicking on it.