- ("<XF86Back>" . pdf-history-backward)
- ("<XF86Forward>" . pdf-history-forward)
- ("M-RET" . image-previous-line))
+ ("<C-XF86Back>" . pdf-history-backward)
+ ("<mouse-8>" . pdf-history-backward)
+ ("<drag-mouse-8>" . pdf-history-backward)
+ ("<C-XF86Forward>" . pdf-history-forward)
+ ("<mouse-9>" . pdf-history-forward)
+ ("<drag-mouse-9>" . pdf-history-forward)
+ ("M-RET" . image-previous-line))