XnView Software

Will be good to have simplified interface mode:
4 auto-hide buttons at top - One button for menu(vertical drop down), one for Show/Hide Tree pane, one for Show/Hide Preview pane, Exit button - all inside AUTO-HIDE bar - option to add custom buttons!.
File list (small) toolbar -same as now.
Equal-height Thumbnails (Like Google image search) as suggested here: http://newsgroup.xnview.com/viewtopic.php?f=34&t=32688
Frame-less and border-less windows (or 1 px border),no vertical scroll-bars > scrolling in each pane - on mouse over.

And that's all.
Simplified View Mode.
Very similar to "Hidden title bar" presented now but using auto-hide and less interface elements,
And very similar to those online Apps with minimized menu. All space free for browsing and viewing.

Playing with interface options I see most of the above described interface mode can be done if all toolbars have an auto-hide control.
So I will ask now:
Is it possible to add auto-hide option for all toolbars and menubar.
(There is something similar in Adobe Lightroom side, top and bottom panels for example.)