• Go to the Central Administration page of SharePoint and click on the Application Management tab.
• Click on Distributed Caching under StorageEdge Management.
• Click on Content Optimization under Distributed Caching.
   
  
   
• Check the ViewState Caching and/or Javascript and CSS minifying and/or Image Combining check boxes beside the Enable Content Optimization text.
• Specify Cache name
• Specify Expiration time
• Specify Caching threshold

• Select the Web Applications from the list for which you wish to enable Content Optimization.

• Click on the Apply button.