These options control which components of an animation curve are available for selection and editing.
Enables selection of any of the components of an animation curve.
Constrains your selection to only animation curve segments.
Constrains your selection to animation curve segments. Press M to select the curve and use the Up or Down arrow keys to move through the selected curves.
Constrains your selection to keys.
Constrains your selection to the in tangents of a key. In tangents are the tangents that describe the shape of the curve segment entering a key.
Constrains your selection to the out tangents of a key. Out tangents are the tangents that describe the shape of the curve segment leaving a key.