Das Werkstatt

There are some commandline applications that offer their help on pressing the "F1"-key.
Unfortunately however, the xfce4-terminal application also has its help assigned to "F1".
This makes sense, but it's more likely that one wants to call the F1-function of the application running in the terminal instead.

Thanks to This post by user "Vadim" on superuser.com, here's how you do it:

1. Run xfce4-appearance-settings.
2. Click Settings tab.
3. Check Enable editable accelerators.
4. Click Close.
5. Open an xfce terminal.
6. Click the Help menu.
7. Hover over Contents (do not click).
8. Press the Del key to delete the accelerator.

This can generally be used to remove (and even edit!) menu keyboard-shortcuts on XFCE4 applications! Wow!
See the XFCE4 documentation article about this feature for more information.