Do you have a conversation in your email where you need to insert documents from SingleCase?
Click on a document (or use the "ctrl" or "cmd" button to select multiple documents) and select "Download".
Downloading a single document or multiple documents is done in the classic way as from any website.
In the case of a single document, it will appear at the bottom of the browser. Select and drag it into the email client window.
In the case of multiple documents, a window with the downloaded files will appear at the end. Simply select these and drag and drop them into the message window in Outlook or another mail client.