Edit a key to change its time, value, or both. The Curves view provides the following different methods for editing a key:
Right-click a key and select Edit from the context menu to enter specific values for time and value.
Select a key and press Enter to enter specific values.
Select and drag a key to change it time and value.
Drag a key vertically, then press Shift to snap the key on the vertical axis. This changes the value of the key, but not its time.
Drag a key horizontally, then press Shift to snap the key on the horizontal axis. This changes the time of the key, but not its value.