Tap twice or spread your fingers to zoom in
Ctrl++Ctrl+–
Zoom in and zoom out
Click once to zoom in, click again to zoom out
Roll the mouse wheel to zoom in/out
Ctrl+O
OverviewF2
ContentsCtrl+P
PrintAlt+S
ShareCtrl+B
BookmarksCtrl+S
DownloadF11
Switch between fullscreen and normalF10
Switch on / switch off the soundF1
HelpNext double page
PageDown
Last page
End
PageUp
Previous double pageHome
FrontpageCtrl+Alt+D
Add / remove bookmark