Enable SharePoint document conversions in PowerShell

Some of the document management features in SharePoint require certain features to be enabled.

I'd advice any developer, specially SharePoint developers, to learn how to administrer these settings by PowerShell. In this case here is How it is done.

Enable the DocumentConversions functionality

$app = Get-SPWebApplication http://site
$app.DocumentConversionsEnabled = 1
$app.Update()