Sure we don’t want to edit in our master page everyday….
And hopefully not give this permissions to all stuff, it’s Critical when it comes to playing around our master page and we don’t understand it.
So SharePoint 2010 gave us new option to Shut Down SharePoint Designer.
… you can disable it from Site Owners and from Designers
by going to Site Action > Site Settings > and under Site Collection Administration > click on SharePoint Designer Settings… from here there are four options to disable and they are enabled by default.
You see the below message when you try to open your site after disabling the SPD, remember trying to open it by System Account will open, i am opening by Site Owner which is the permssions in the SharePoint Designer settings in the Site settings page.
Not only can you disable it from Site Owners and Designer but also from Site Collection Administrators…
From Central Administration > Manage Web Applications > and from thr ribbon click General Settings > SharePoint Designer
Those below options are from SharePoint Designer Settings in Central Administration