You have created a message or a webpage in Spotler and you want to link to a document. Adding attachment is not an option and it will use more data to download.
In Spotler you can easily set up a link to a document. Select a word or a part of a sentence in the editor and click on the paperclip-icon (Insert/edit link). A drop down menu will show multiple options, amongst them is the option Link to a document. Choose the document you want to link to and that's that. When the recipient clicks on the link, the document will be opened in his browser.