Blender grease pencil doesn't show onion skin

Support Basics & Interface
1

Hello,

I made a basic stroke 2D animation with grease pencil.

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image3456×1866 564 KB

I made drawings in every key frame.
I turn on onion skin on data menu, viewport overlay, i checked all the options of onion skin panel that I saw but nothing.

Any other ideas?

Thank you!

2

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image1820×1050 213 KB

Okay I found that you can turn on onion skin on layers AND material. Now it works