Line attached to keyframe

[MahaB82A]

Why is line attached to keyframe missing at the bottom?

[Mrtn Ritter · Accepted solution]

The tangent is missing, because this keyframe is not eased. Mark the keyframe, press F9 to apply easyease and you are good to go.

*Martin

[MahaB82A]

Thank you very much for help. 

[MahaB82A]

What is meant by "ease"?

[MahaB82A]

What is meant by "ease" here?

[Warren Heaton · Accepted solution]

Since the current Keyframe Interpolation of the 1st keyframe is Temporal: Linear, there's no tanget to show. 

By pressing F9 (as mentioned in the prior post) while that keyframe is selected, you tell After Effects to apply Animation > Keyframe Assistant > Ease Ease.  This changes the Keyframe Interpolation of the 1st keyframe from the Temporal: Linear default to Temporal: Bezier and as such there's a tangent to show.

Keyframe interpolation in After Effects (adobe.com)

[MahaB82A]

Thanks for exolanation and link