If you make mistakes with regards to keyframe positions, you can always copy and paste them elsewhere.
Copy = Only existing movements in the keyframe.
Copy frame = Copy existing movements in the keyframe and create some for static ones. Adds 1 to all particles' animated emission for that keyframe, among others, and bloats things. Not recommended.
Copy = Only existing movements in the keyframe.
Copy frame = Copy existing movements in the keyframe and create some for static ones. Adds 1 to all particles' animated emission for that keyframe, among others, and bloats things. Not recommended.
XY Rotations are from the top, ZX from the side, and YZ from the front. At the bottom bar, pick a keyframe where you want the rotation to start, and another where you want it to end.
360° rotations require a minimum of 4 keyframes. The first and the fourth will have the same rotation (I recommend setting them first), while the others are increments of 120°.
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A rather archaic technique I use for creating a keyframe with the current rotation is to -1° and +1° the desired field.
For the second rotation keyframe, input 120°. For the third, since it'll be halfway to getting back to its previous position, input 180°.
The keyframes have to be spread out evenly, with the distance between each equal to 1/3rd of the total desired time span.