Minimal posts to see sth??? how to do ?

I want that some of my forums have restricted rules.like minimal number of post to see something..how to do this ???

Hello,

First, you will have to restrict the permissions of 'members' on some of the forums you want to restrict them via category permissions (Admin Panel > General > Categories & Forums > Permissions > Uncheck the box that says 'view and read' for members > Save)

Then you can create an auto subscribe group:
https://help.forumotion.com/t57913-auto-subscribe-to-groups

Where you'll give the created auto subscribe group the permission to view the un-viewable forums of the normal members. (Admin Panel > General > Categories & Forums > Permissions > check the box that says 'View and Read' for the created auto subscribe group > save