Main toolbar > Curve Editor (Open) > Modes > Dope Sheet > Right-click a master track key in the Dope Sheet Key window. > Master
Track Key Info dialog
Graph Editors > Track View - Curve Editor > Open Track View > Modes > Dope Sheet > Right-click a master track key in the Dope
Sheet Key window. > Master Track Key Info dialog
Right-click a green master key in Track View to display the Master Track Key Info dialog.

Key Arrows—Moves to the next or previous key.
Time—Moves the master key to a new time.
List Window—Displays all the animated sub keys at a particular keyframe.
Select Point—Select a node in the List Window and the corresponding node in the viewports is selected.
Key Frame Properties—Controls interpolation and position. See Bezier Controller.