They told me that there is a way to make automatic filters in the subfile by pressing Alt-F6, but I can't turn the filters. Is there an option that needs to be activated?
There are subfile filters and you can activate them by pressing ALT+ F key. If you want a a general guide on how to activate and use them, access Google Search and download the manual file from the EDM.IT website. Open the file then go to page 30 and you will have the possibility to learn how the filters work and how you can activate them.