The Blofeld uses a quite similar theme: You select a page with the buttons. You can then scroll to additional pages with the page select encoder. Or put differently: The pages are arranged like:
where each of these has multiple sub pages for the multiple oscillators, and each of those has in turn a few pages of settings. e.g.
OSC1-1, OSC1-2, OSC1-3, OSC2-1, OSC2-2, OSC2-3, VCF1-1, VCF1-2,VCF2-1, …
Scrolling the encoder scrolls through all the pages, ony by one. Pressing the ENV Button selects page ENV1-1. Pressing the ENV button again selects page ENV2-1
Its much easier to use than to explain. Basically its like a book with multiple pages and shortcut buttons to take you to the chapter beginnings.
SAVE could be realised by pressing a button combination. it could be indicated on the panel by linking two buttons with a line and writing SAVE next to it.