Extension Manager 

Some general settings can be configured in the Extension Configuration in the administration module. If you need to configure those, switch to the module "Admin tools" -> "Settings" -> "Extension Configuration", select the extension "paste_reference" and open it!

There are three settings:

Properties 

disableCopyFromPageButton 

You can disable the "copy from page button" in the page module if you don't need it.

overlayShortcutTranslation 

Use language overlay for content and page records referenced in shortcut elements.

enableExtendedShortcutPreviewRenderer 

Enable extended shortcut preview renderer in TYPO3 backend. Enabled by default.