Read Mode is a client-side preference, your document cannot directly disable it through an action or script - however if the PDF is set with an initial view that displays one of the sidebars (such as "Document and Bookmarks") the classic UI will be displayed instead.
Sorry to be a tad harsh. We've been using Acrobat for years and for the most part, we love it!
A PDF file cannot change the user's interface layout except to do a couple of very specific things, and they are all very temporary. It can hide the toolbars and menus, but the user can show them again with F8 or F9. It can ask permission to open in full-screen mode, but the user can deny that permission. It can force Read Mode to be disabled by displaying a side panel (e.g. bookmarks) but it cannot force Read Mode to be enabled, and a user preference takes priority (so for example the user can choose not to allow any document permission to hide the toolbars, via Preferences - Documents - Open Settings).
There is absolutely no access to the controls on the HUD, you cannot add or remove buttons even with a plugin. It's a decision Adobe made when the HUD was first developed, and so the code to customize it simply isn't there.
Thank you very much for such a prompt and courteous reply.
My enquiry was prompted by our having to revisit a range of products we
developed using Adobe Director and the INM Impressario Xtra. We are very
excited by the potential of AIR, Acrobat X Portfolios and Flash Builder but
rather shame-faced for having come to them rather late. No matter, better
late than never.
Your explanation is very helpful as it will help us offer explanations to
our clients. I am sure they can be persuaded given the larger benefits.
Dr Ian Sedwell
Visual Studios, 44 Greenhill, Weymouth, DT4 7SL, UK
+44 (0)1305 778484
+44 (0)7964 682 603