I saw a post which answers my question:
But, it was a year ago and I just wanted to know if anything has changed. Can we save an element as a global block now?
Also, I couldn't quite follow everything said in the answer:
There is no direct transfer from page builder to global templates. But, you can save your page as a template and go to global templates and add it.
Plus, you can select sections of you wishes to save as templates
So, I have two buttons in a custom header that I would like to use as global elements in other pages. It's actually in a container and I wouldn't mind saving the container as a global block and using that instead of each button.
Can someone walk me through how I can get it into a global block or a workaround? I saved my header as a template and I could see it in Template Manager, but, I didn't see any option to edit it.