if you are talking about branches of your website and each branch (menu) has same permission, you may apply changes to topmost page and force all childs and grandchilds to inherit permission (see control panel). Otherwise you would need to use SQL to perform your job.

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Cheers from Germany,
Sebastian Leupold

   

Speed up your DNN Websites with TurboDNN

insert into {databaseOwner}{objectQualifer}TabPermissions (tabid, permissionId, AllowAccess, RoleId, UserId) SELECT tabid, PermissionId, 1 as AA, 234 as rl, Null from {databaseOwner}{objectQualifer}TabPermissions WHERE roleId = 123 // replace 123 with your 2012 roleID and 234 with id of the newly created role. Start with a database backup and restart app after you ran this script from inside Host > SQL.

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Cheers from Germany,
Sebastian Leupold

   

Speed up your DNN Websites with TurboDNN