Keyframe graph editing

Hi all
I have been asking for better graph modification for years.
In case you don't know this: I accidentally found out you can tilt the keyframe selection in AE V18.1.0.
It's well-hidden positioning the cursor just right and don't know how long it has been there.

Show transform box in the timeline graph editor. Select some keyframes.
Position your cursor right between the right- or left-hand edge and corner mark - the cursor shows a small cross icon. You can freely move the selection box edges.

Repositioning the centre mark allows precise handling.

Thank you, Adobe.