Header, footer and the 404 page
Edit the top navigation, footer and “page not found” page of a Tessolo site — the three items in the Pages list with no address of their own.
Three things in the Pages list have no address of their own but behave like pages when you edit them.
Top navigation and footer

Your top navigation carries the brand, the menu and any announcement bar. The footer carries links, contact details and copyright. Both appear on every page of the site, so you build them once.
If your site came from a template they already exist. Otherwise use Add top navigation or Add footer at the bottom of the Pages list.
Editing them is the same as any page: click the entry, and the canvas shows just that piece. While you're editing an ordinary page they appear above and below the canvas, greyed out, so you can see how the page really sits — click either one to jump into editing it.
A change to the header shows on every page, so republishing after editing it republishes the whole site. That's expected — it's one piece of content shared by everything.
Removing one
There's a Remove action. It disappears from every page. You can add one again later, but its content starts over — there's no undo, so if you're experimenting, empty it rather than remove it.
The "page not found" page
When a visitor opens an address that doesn't exist — an old link, a typo — they get this page.
It has no address of its own and is never indexed, so it has no path and no SEO settings. Everything else edits like a normal page: put your brand on it, a friendly line, and a link back to the homepage.
You don't have to build one. If you don't, visitors still get a proper "not found" response. That matters more than the design: a dead link that pretends to be a normal page ends up indexed by search engines as if it were real content. Tessolo never does that.
What to put on it, in order of usefulness: a link home, your main navigation (so they can get somewhere), and a search or list of popular pages if you have one. Apologising is optional; giving them somewhere to go is not.
Page templates
Save a finished Tessolo page as a page template and start new pages from it on any site in the workspace — and what can't come across.
Detail page templates
Design one detail page template in Tessolo and every entry in a collection gets its own page and address, with related entries and per-entry SEO.