Can I copy attchment key frame and paste it to the other? In this case the first and second slot all have the same name for every of their attachment, which mean the copy and paste should be possible, right?
Huy137 Unfortunately, it is not possible to copy and paste the attachment key for a slot to another slot using Ctrl+C and Ctrl+V. The issue of being able to copy and paste attachment keys to other slots has been on our roadmap for quite some time:
EsotericSoftware/spine-editor165
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As a workaround, when duplicating a slot, you can choose whether or not to duplicate the keys, so it is possible that the duplicated slot will have the same keys.