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.