Change Project Permission Mode in project server 2013

Change Project Permission Mode:- How to show security tab in your settings page

Change Project Permission Mode for a Project Web App instance. Running this command deletes all security settings. and reverts to the default settings for the specified mode.

Step 1.Open SharePoint 2013 shell management.
Step 2.add command:

Set-SPPRojectPermissionMode -Url http://ServerName/pwasite -AdministratorAccount DomainNameadministrator -Mode ProjectServer .

This will show transitioning a server into Project Server permission mode.You will get security section

Set-SPPRojectPermissionMode -Url http://ServerName/pwasite -AdministratorAccount DomainNameadministrator -Mode SharePoint .

This will show transitioning a server into SharePoint permission mode.