WHAT IS A CONTAIER FIELD?
Welcome to the community, @maxi1!
I see you marked the question as Assumed Answered.
A good place to start is this help topic (follow the links, too!):
https://fmhelp.filemaker.com/help/16/fmp/en/#page/FMP_Help/container-fields.html About container fields
p.s. in future, your posts to "Discussions" rather than "Community Feedback and Information" will get you more assistance. If you'd like to delete this post or move it to @Discussions, click the Actions (gear icon) menu in the upper right and select the appropriate sub-menu.
Thank you for the extra information Beverly - this was most helpful in my quest to learn about my new database
Sent from my iPad
Retrieving data ...