Setting info Window as standard


there to us nextcloud as a DMS it would be great to set the info Window visibility as standard if the a file is chosen.
In some other web project users can pin some fields…would be great to pin the info field and then users can see also a preview of a file.
Is it also possible to change the dimension of the preview for documents or pdf so that it looks more in the the Size of A4 for europe or letter for the us.