Problem solved. I found it under Posts. Why could not the help-function come up with that?
I have imported some data into a new table and now I need to add individual ID:s to each post, starting from 1 and then just adding 1 for each post. I can not find any autofill function in FM, and serarching the help-function does not result in anything. Any suggestions, or do I have to start writing scripts for such a thing?