Keyframe Paste Merge Items

MIX:

Mix.

Overlay existing with new keys.

OVER_ALL:

Overwrite All.

Replace all keys.

OVER_RANGE:

Overwrite Range.

Overwrite keys in pasted range.

OVER_RANGE_ALL:

Overwrite Entire Range.

Overwrite keys in pasted range, using the range of all copied keys.