The extension needs to be installed as any other extension of TYPO3 CMS:
Switch to the module “Extension Manager”.
Get the extension #. Use composer: Use composer require ehaerer/paste-reference.
Get it from the Extension Manager: Press the “Retrieve/Update” button and search for the extension key paste_reference and import the extension from the repository.
Get it from typo3.org: You can always get current version from https://extensions.typo3.org/extension/paste_reference/ by downloading either the t3x or zip version. Upload the file afterwards in the Extension Manager.
The Extension Manager offers some basic configuration which is explained here.
Latest version from git¶
You can get the latest version from git by using the git command:
git clone https://github.com/Kephson/paste_reference.git
The master branch supports TYPO3 CMS 9 and 10 only.