the right way to animate a sequence

[red hamster]

If I placed some element on the screen, 4 image files for example, and want to animate them in a sequence, frame = to 200, right? It is better to:
1) animate all the images at the same time
2) animate first the image n1, all the steps then return to frame 0 and again animate the image n2, so until the last image(or vector layer ,it is the same)?
I notice that , if I animate the images at the same time the final files had some mistakes.

[red hamster]

For istance, I notice this : if I resize an image layer in the frame 200, it began to change size in the frame 100 or so , if I hide a layer in some point of the animation the layer disappear in whole the movie.

[myles]

For istance, I notice this : if I resize an image layer in the frame 200, it began to change size in the frame 100 or so

Animation happens "between" one keyframe and the next. Frame 0 is an automatic keyframe. So if you resize at frame 200, the resize will happen from frame 0 (automatic "start" keyframe) to frame 200. If you want the animation to happen between frame 200 and frame 220, you must put a "start" keyframe (beginning size - you can copy frame 0) at frame 200 and an "end" keyframe at frame 220 (final new size). If you want instant one-frame size changes, you might want to change the keyframe interpolation to "step" rather than the default smooth.

See this page for a little bit more about keyframe interpolation.

if I hide a layer in some point of the animation the layer disappear in whole the movie.

I suspect you are using the little "eyes" in the Layers panel. These are for temporarily hiding a layer while you work (or render), not animating layer visibility.

To animate layer visibility, it is probably easiest to keyframe the Layer Visibility channel in the timeline.

Regards, Myles.

[red hamster]

Thanks! Now i'll try our suggestion.