- k.add :page_down, "Down one page", :page_down, ' '
- k.add :page_up, "Up one page", :page_up, 'p', :backspace
+ k.add :page_down, "Down one page", :page_down, ' ', "\C-f"
+ k.add :page_up, "Up one page", :page_up, 'p', :backspace, "\C-b"
+ k.add :half_page_down, "Down one half page", "\C-d"
+ k.add :half_page_up, "Up one half page", "\C-u"