Adding new link to Admin Navbar

Is there a guide on how to add custom links to the navbar in the admin area?

In this portion here, I tried to modify the header_navigation.php file but my change doesn't seem to come through?

Use
$zco_notifier->notify('NOTIFY_ADMIN_HEADER_UPPERMENU', $upperMenuArray, $upperMenuOverrideArray);

If you are not familiar with notifer-observers, get familiar. You won't look back.

torvista:

Use
$zco_notifier->notify('NOTIFY_ADMIN_HEADER_UPPERMENU', $upperMenuArray, $upperMenuOverrideArray);

If you are not familiar with notifer-observers, get familiar. You won't look back.

Any particular event should I attach it to?

retched:

Any particular event should I attach it to?
Er, NOTIFY_ADMIN_HEADER_UPPERMENU, which is issued by admin/includes/header.php

Here is an example of use:

https://gist.github.com/torvista/1e6d153a83e01b7ae1d438a5ae3d0e49

which I use to make the "Storefront" link go to the product or category that is currently being viewed in the admin.

Caveat Emptor

Bear in mind that this is a new unreleased notifier, so you'll have to pull in admin/includes/header.php from Github.

A nice improvement coming to a Zen Cart release soon!

this is a new unreleased notifier

Oops sorry, I forget I'm on the bleeding edge.

Thank you for helping us test the bleeding edge! This makes it more likely that when we do release, it will be of better quality.

swguy:

Bear in mind that this is a new unreleased notifier, so you'll have to pull in admin/includes/header.php from Github.

A nice improvement coming to a Zen Cart release soon!

Oh, okay, so I wasn't crazy. I ended up pulling it from the main branch when I didn't see it in the notifier report in the documentation. Managed to get this to work relatively easily with the observer.