Find the required row (operator) and column (permission type) and click its label. The permission details dialog opens and allows you to set the following values:
Permission value - you can choose one of the following options:
Allow - user is granted with permission. If some group, organizational unit or role is granted with permission, then its members are granted with the permission too.
Deny - user is denied to do the action. If some user is member of at least one group, organizational unit or role that is denied to do this action, then the user is denied to do it too, no matter if he is allowed to do it.
None - this value doesn't mean any permission. The result value is derived from the permissions of the groups, organizational units or roles, the operator is member of.
Valid From - date the permission is granted from. This value must be always set.
Valid To - date the permission is granted to. Leave it empty if you don't want to restrict the permission validity.