The Keys panel can be located in the Graph Editor Sidebar when you have one or more keyframes selected.

Interpolation
- Constant: No interpolation, value of A gets held until B is encountered
- Linear: Straight line interpolation between A and B (i.e. no ease in/out)
- Bezier: Smooth interpolation between A and B, with some control over curve shape
Subframes
When enabled, Key Frame’s will adjust with decimal values rather than whole numbers.
Key Frame
Frame number of first keyframe in first F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ frame numbers relatively.
Key Values
Value of first keyframe of First F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ values relatively.
Left Handle Type
- Free: Completely independent manually set handle
- Aligned: Manually set handle with rotation locked together with its pair
- Vector: Automatic handles that create straight lines
- Automatic: Automatic handles that create smooth curves
- Auto Clamped: Automatic handles that create smooth curves which only change direction at keyframes
Left Handle Frame
Left handle frame number of first keyframe in first F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ left handles relatively.
Left Handle Value
Left handle value of first keyframe in first F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ left handles relatively.
Left Handle Length
Left handle length of first keyframe in first F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ left handles relatively.
Right Handle Type
Free: Completely independent manually set handle
Aligned: Manually set handle with rotation locked together with its pair
Vector: Automatic handles that create straight lines
Automatic: Automatic handles that create smooth curves
Auto Clamped: Automatic handles that create smooth curves which only change direction at keyframes
Right Handle Frame
Right handle frame number of first keyframe in first F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ right handles relatively.
Right Handle Value
Right handle value of first keyframe in first F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ right handles relatively.
Right Handle Length
Right handle length of first keyframe in first F-Curve in selected F-Curves. Adjusting this value will affect other selected F-Curves’ keyframes’ right handles relatively.