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Here is Bard's take on Synfig keyframes and waypoints:

In Synfig, the terms "keyframes" and "waypoints" are often used interchangeably, but there are some subtle differences between them. Here's a breakdown:

Keyframes:

Markers: They act as markers on the timeline, defining specific points in time where the properties of an object (position, rotation, opacity, etc.) are explicitly defined.

Starting points: They typically define the beginning and end states of an animation, acting as anchor points for interpolation.

Trigger points: They can trigger events or changes in behavior within the animation.

Controllable transitions: You can control the transition between keyframes, specifying whether it's linear, ease-in/out, or something else.

Waypoints:

Intermediate points: They are additional points within a keyframe interval that define how the object's properties change between the keyframes.

Smoother animation: They allow for smoother and more nuanced animation by specifying intermediate states.

Fine-tuning control: You can add and adjust waypoints within a keyframe to fine-tune the animation curve.

Automatic generation: In some cases, Synfig automatically generates waypoints based on changes made to object properties.

In essence:

Keyframes define the major turning points of the animation.

Waypoints refine the journey between those turning points.

Here's an analogy: Imagine driving from point A to point B. Keyframes would be like setting your GPS destinations at A and B, while waypoints would be like picking specific landmarks along the way to guide your route.

Here are some additional resources that might be helpful:

Synfig User Manual: https://wiki.synfig.org/

Synfig for Beginners: Keyframes and Waypoints Explained: https://youtu.be/tAwbC7dPcgs?si=oFbtv-zObPNUwnZn

Synfig- Keyframes or Waypoints? Answered: You should add a 10% waypoint for @keyframes wave - HTML-CSS - The freeCodeCamp Forum

I hope this clarifies the difference between keyframes and waypoints in Synfig!