That is unfortunately not possible. If a permission was granted via the Permission Group, it can only be removed via that group. Alternatively, assign the user a Permission Group in which the relevant right is not activated.

The permissions from multiple Permission Groups layer over each other like templates – all granted permissions take effect.

In principle, the higher right always applies. For example, if an Author has the permission Instructional Material: Change, create via a Permission Group, this can no longer be withdrawn for a specific folder or object. You must work backward and, in a first step, change the permission for the Instructional Material for all users to: Read. After that, you can then give the selected group of persons or person the right to change the Instructional Material on the object itself.

No, unfortunately it is not that simple. To do this, you have to think about the entire permission concept differently from the ground up, as permissions are inherited.

If you possess the equivalent or higher General Permission, the Object Permission is ignored and the General Permission applies. To remove the permission, you must either edit Permission Group or you must know at which point the Object Permission was granted and remove it there.

This means that the permission is “only” inherited at this point and has already been granted at a higher level. You can therefore only remove this permission at the level where it was granted: either directly in the Permission Group, on the relevant Author, or on the parent object/category.