We are using GroupsDocs mainly for displaying PDFs. Our client has asked us if the viewer can mimic Adobe Reader plug in keyboard shortcuts. Ctrl +/- to Zoom when the viewer has focus. Page Up/Down and Arrow Up/Down to scroll up/down.
Page Up/Down and Arrow Up/Down works once the viewer has focus (by clicking on the scrollbar). However, is there another to have the viewer DIV has focus? In IE8, it seems to work (there is a delay sometimes) by clicking on the viewer area, however, doesn't work in IE9, 10, and 11.