Yes it does work in landscape mode. I use this in portrait mode to display PDF sheet music in this format for readability and my page turn software - BTW both are shareware apps and have no problem displaying in portrait mode. My browser, Reaper DAW, File Explorer...etc all display correctly in portrait mode...BIAB is the only app that does not. It appears to me that BIAB had some sort of embedded legacy code that prevents the main GUI from being resized without clipping off.

Is there an "ini" file, registry hack or other configuration file I can modify to allow it to display 100% of the application when in portrait mode?

Any help appreciated - John