Round keyframes?

[Daniel Waldron]

They may be set to “Rove Across Time”. So if you move the first or last keyframe (which shouldn’t be round), the round ones in the middle should adjust to keep the animation the same.

[Greg Digenti]

I realize this is a question from 4 years ago, but just in case anyone else ends up here looking for the answer, the large round keyframes are called Auto Bezier Keyframes.

A decent definition can be found here:
https://www.austinsaylor.com/blog/keyframe-essentials