To gain more document screen space, the sidebar can be automatically hidden.
Hide Sidebar in Portrait Mode
To gain more document screen space, the sidebar can be automatically hidden when your display device is in portrait mode. Select Extras
Settings
Display
Sidebar and check Hide sidebar in portrait mode. This option is recommended for Tablet PCs.
See also
Page URL: http://www.GRAHL-software.com/pdfannotator/std/en/help/index.html?optsidebar.htm