Editing¶

Transform¶

Reference

Mode: Edit Mode
Menu: Key ‣ Transform

An F-curve can be edited by transforming the locations of the keyframes.

Move, Rotate, Scale: Like other elements in Blender, keyframes can be moved, rotated, or scaled as described in Basic Transformations.
Extend: Todo.

Tip

For precise control of the keyframe position and value, you can set values in the Active Keyframe of the Sidebar region.

Snap¶

Reference

Menu: Key ‣ Snap
Hotkey: Shift-S

Keyframes can be snapped to different properties by using the Snap Keys tool.

Current Frame

Snap the selected keyframes to the Playhead.

Cursor Value

Snap the selected keyframes to the 2D Cursor.

Nearest Frame

Snap the selected keyframes to their nearest frame individually.

Nearest Second

Snap the selected keyframes to their nearest second individually, based on the FPS of the scene.

Nearest Marker

Snap the selected keyframes to their nearest marker individually.

Flatten Handles

Flatten the Bézier handles for the selected keyframes.

Flatten Handles snapping example.¶
Before Flatten Handles.¶	After Flatten Handles.¶

Mirror¶

Reference

Menu: Key ‣ Mirror
Hotkey: Ctrl-M

Selected keyframes can be mirrored over different properties using the Mirror Keys tool.

By Times Over Current Frame: Mirror horizontally over the playhead.
By Values over Cursor Value: Mirror vertically over the 2D cursor.
By Times over Time 0: Mirror horizontally over frame 0.
By Values over Value 0: Mirror vertically over value 0.
By Times over First Selected Marker: Mirror horizontally over the first selected marker.

Insert Keyframes¶

Reference

Menu: Key ‣ Insert Keyframes
Hotkey: Ctrl-LMB, Shift-Ctrl-LMB

Ctrl-LMB inserts a keyframe to the active F-curve at the mouse position. The newly added keyframes will be selected, making it easier to quickly tweak the newly added keyframes. All previously selected keyframes are kept selected by using Shift-Ctrl-LMB.

Add F-Curve Modifier¶

Todo.

Bake Sound to F-Curves¶

Reference

Menu: Key ‣ Bake Sound to F-Curves

The Bake Sound to F-Curves operator takes a sound file and uses its sound wave to create the animation data.

Lowest Frequency

Cutoff frequency of a high-pass filter that is applied to the audio data.

Highest Frequency

Cutoff frequency of a low-pass filter that is applied to the audio data.

Attack Time

Value for the hull curve calculation that tells how fast the hull curve can rise. The lower the value the steeper it can rise.

Release Time

Value for the hull curve calculation that tells how fast the hull curve can fall. The lower the value the steeper it can fall.

Threshold

Minimum amplitude value needed to influence the hull curve.

Accumulate

Only the positive differences of the hull curve amplitudes are summarized to produce the output.

Additive

The amplitudes of the hull curve are summarized. If Accumulate is enabled, both positive and negative differences are accumulated.

Square

Gives the output as a square curve. Negative values always result in -1, and positive ones in 1.

Square Threshold: All values lower than this threshold result in 0.

Jump to Keyframe¶

Todo.

Copy/Paste¶

Todo.

Duplicate¶

Todo.

Delete Keyframes¶

Todo.

Handle Type¶

Todo.

Interpolation Mode¶

Todo.

Easing Mode¶

Todo.

Decimate¶

Reference

Menu: Key ‣ Decimate (Ratio)
Menu: Key ‣ Decimate (Allowed Change)

The Decimate operator simplifies an F-curve by removing keyframes that influence the curve shape the least.

Mode

Controls which method is used pick the number of keyframes to use.

Ratio: Deletes a defined percentage of keyframes, the amount of keyframes to delete is define by the Remove property.
Error Margin: Deletes keyframes which only allowing the F-curve to change by a defined amount. The amount of change is controlled by the Max Error Margin which controls how much the new decimated curve is allowed to deviate from the original.

Clean Keyframes¶

Reference

Menu: Key ‣ Clean Keyframes
Hotkey: X

Clean Keyframes resets the keyframe tangents on selected keyframes to their auto-clamped shape, if they have been modified.

../../../_images/editors_graph-editor_fcurves_editing_clean1.png

F-Curve before cleaning.¶

../../../_images/editors_graph-editor_fcurves_editing_clean2.png

F-Curve after cleaning.¶

Clean Channels¶

Reference

Menu: Key ‣ Clean Channels
Hotkey: X

Acts like the Clean Keyframes operator but will also delete the channel itself if it is only left with a single keyframe containing the default property value and it’s not being used by any generative F-curve modifiers or drivers.

Note

The modified curve left after the Clean tool is run is not the same as the original, so this tool is better used before doing custom editing of F-curves and after initial keyframe insertion, to get rid of any unwanted keyframes inserted while doing mass keyframe insertion (by selecting all bones and pressing I for instance).

Smooth Keys¶

Reference

Menu: Key ‣ Smooth Keys
Hotkey: Alt-O

There is also an option to smooth the selected curves, but beware: its algorithm seems to be to divide by two the distance between each keyframe and the average linear value of the curve, without any setting, which gives quite a strong smoothing! Note that the first and last keys seem to be never modified by this tool.

F-Curve before smoothing.¶

../../../_images/editors_graph-editor_fcurves_editing_smooth.png

F-Curve after smoothing.¶

Sample Keyframes¶

Reference

Menu: Key ‣ Sample Keyframes
Hotkey: Shift-O

Sampling a set of keyframes replaces interpolated values with a new keyframe for each frame.

../../../_images/editors_graph-editor_fcurves_editing_sample.png

F-Curve before sampling.¶

../../../_images/editors_graph-editor_fcurves_editing_sample2.png

F-Curve after sampling.¶

Bake Curve¶

Reference

Menu: Key ‣ Bake Curve
Hotkey: Alt-C

Baking a curve replaces it with a set of sampled points, and removes the ability to edit the curve.

Discontinuity (Euler) Filter¶

Todo.