@BosFanTina I did it but can't remember how,, was accidental.
But this may help: https://counter.social/userguide.pdf
If you mean columns, the little menu in the top right corner of the column.
https://help.counter.social/en/latest/browsing-and-curation.html#add-or-remove-columns
If you mean pinning one of your own posts, use the little ellipsis menu (…) under the post, next to the star/favorite. "Pin to profile".
https://help.counter.social/en/latest/posting-content.html#editing-existing-posts
nosanitize
@BosFanTina
This will tell you
https://help.counter.social/en/latest/