I was about to open an idea for this exact request. Our organization has branded the Indoors Viewer internally as "DeskQuest" but there's no way for us to put that title anywhere in the application itself. This would be a very nice cosmetic enhancement.
Our org would also love this capability. We have a separate public viewer for all of our campus and plan to have more for internal/employee use and it is difficult to differentiate them. We currently just have a "logo" uploaded with the campus name, but it is very small and difficult to fit much legible title information in it.
We branded it with an image/logo that includes text, similar to your usage of DeskQuest @Zrobinson_SFPUC , and it serves as the app title. We used a .svg so it scales nice. If you just want title text and no logo you can still use that as a workaround—create an svg image of just your title text and upload it as a "Custom Logo" in the Indoors Viewer configuration options. Just make sure the image aspect ratio is wide and narrow with minimal empty space on the upper/lower margins, so that it maximize its space in the header.
