Animation curve handle should be locked vertically if holding shift
If you edit the animation curve of a keyframe, it's very hard to only change the influence-value (left & right) without also changing the speed-value (up & down).
If you could lock the graph-handle's height to zero by holding down the shift key it would be much more user-friendly.
After Effects even has a very useful auto-snap feature, see attachment.

2 comments
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Elijah Ciali commented
100% Agree. This is a big issue and I'm surprised more people haven't voted. Bump.
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Gammel Sami commented
This is UID 1 on my request list: https://docs.google.com/spreadsheets/d/18RcNvUkwjr8qLAUEF0QVPk2fIr7RMqKZ_igswkcpwg4/edit?usp=sharing