How can I change the keyboard shortcuts for single line scrolling in the terminal?

To scroll a single line in gnome-terminal you have to press Ctrl-Shift-↑ or Ctrl-Shift-↓ in Ubuntu.

In other distributions (e.g. Xubuntu) you only have to press Shift-↑ or Shift-↓ for the same behaviour. I would like to change the shortcuts in Ubuntu to work the same, but so far I haven't found an option or config file to change.

The reason why I would like to change this are two-fold: First, I find it more convenient (not having shift and ctrl above each other on a Thinkpad). Second, it is more consistent to the shortcuts for scrolling an entire page ( Shift-Pgup and Shift-Pgdown).

Also, I remember reading the reason behind using ctrl-shift instead of just shift, but I cannot locate that discussion anymore.

According to https://help.gnome.org/users/gnome-terminal/3.8/adv-keyboard-shortcuts.html.en, there are some shortcuts that cannot be edited in gnome-terminal. These are exactly: Ctrl+Shift+↑ and Ctrl+Shift+↓:

In Xubuntu you can use Ctrl+↑ and Ctrl+↓ because Xubuntu uses xfce4-terminal which is different by gnome-terminal. The same happens with other distros.