Possible to restore a backup of SQL Server 2014 on SQL Server 2012?

problem ：

I know that you can't (at least not easily) restore a SQL Server 2012 backup on SQL Server 2008. But how does it work for SQL Server 2014 to SQL Server 2012 ? I know you can't （ At least it's not easy ） stay SQL Server 2008 On the recovery SQL Server 2012 Backup . But how does it come from SQL Server 2014 To SQL Server 2012 Work ？

On database level there is the property to adjust the compatibility mode to any other SQL Server version. At the database level, you can adjust the compatibility mode to any other SQL Server Version properties .

How does this helps or work ? How does this help or work ？Will it only disallow the features from 2014? It will only prohibit 2014 Function of year ？

To be honest I already tried to restore a backup, but 2012 didn't recognize the datafile, so I couldn't click ok Button to start the restore procedure. honestly , I have tried to restore the backup , however 2012 Unrecognized data file , So I can't click “ ok Button Start the recovery process .

Did I miss some important option ? Did I miss some important choices ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/1h4lG