Hiding the SharePoint Login (or anything else)

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This is one of those extremely useful little tidbits that doesn't seem to be all that well documented...

If, for instance, on a internet facing site, you want to hide the login control etc at the top of the page, just wrap the sharepoint Login div with the SPSecurityTrimmedControl tag:

    <Sharepoint:SPSecurityTrimmedControl runat="Server" PermissionsString="AddAndCustomizePages">

        <div class="sharepointLogin">

            ...global links table containing the login control etc.

        </div>

    </Sharepoint:SPSecurityTrimmedControl>

 You can use the SPSecurityTrimmedControl to hide other content as well - any content that you don't want to display to users who don't have a specific right. The PermissionsString specifies a specific right - AddAndCustomizePages is only one possibility. All of the possible settings can be found here:

 https://msdn2.microsoft.com/en-us/library/microsoft.sharepoint.webcontrols.spsecuritytrimmedcontrol.permissionsstring.aspx