Hi @GS8888!

I’m afraid I’m not 100% sure what you mean by “docking” frames to each other, but here are the ways you can achieve this, based on my interpretations :

1. You can lock frames so that they become uneditable:

   

    

2. You can group frames so that they can be transformed as a single unit:

   

Hope this helps! Let me know if I’ve misunderstood you - I’ll be happy to help if you describe in more detail what you’d like to achieve.