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Zarq IqbalZarq Iqbal 

“Enable enhanced document viewer” unchecked in Customize > Salesforce Files > Settings but preview still showing up in Contents tab

I want to remove the preview window that shows up when you click a file in the content tab. I have unchecked the "enable enhanced document viewer" in Customize > Salesforce Files > Settings > Salesforce CRM content but the preview pane is still visible.
ShashankShashank (Salesforce Developers) 
This setting is only for the "Enhanced" version of the preview feature. We cannot disable preview in salesforce content. Here's an idea you can promote: https://success.salesforce.com/ideaView?id=08730000000DqFJAA0