Setting Last Modified Header / Expires Header

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Hi All,

In its Article "Optimize Caching" (https://developers.google.com/speed/docs/best-practices/caching?csw=1#LeverageBrowserCaching) Google recommends to enable both Expires Header and Last Modified Header.

I added Expires Header throughout my .htaccess File and now I wanted to also enable Last Modified Header.

I couldn't find any useful Information how I could enable last modify header in Concrete5. Should it even be enabled? Any Inputs are appreciated.

Thanks, Jan

janwidmer