shortcuts H and V (length and pitch)

In the manual there is no mentioning of the H and V-shortcuts, and these letters(H and V) are not visible in the menu (Note input pull down menu). H and V are not toggling the input mode (as N does)

But on my (two) PC's, these shortcuts both work.

Also these shortcuts are not mentioned in the preference-list.
(H= change note length{1...9}, V=change tone pitch(A..G)

However, these shortcuts are nice to have!
So: even though not documented, please do not remove them.