All treatise files presently end with a polar bear image that, when clicked, will take you back to the top of the file. Scribal practice is variable, however, and if you search for a standardized twentieth-century spelling you may miss some crucial passages because the word you are searching for appears differently in the manuscript. Thus, a bar of twenty common Keyword Search terms is set at the head of each treatise. Click on the keyword within the manuscript, and it will take you back to the Keyword Search bar. If there is more than one passage that seemed relevant to your search, each instance has been linked so that Keyword Search will take you to all of them and then back to the Keyword Search bar.
Some treatises mention specific texts or music of a clausula, motet, conductus, or chanson.
If another theoretical document also mentions that same work, you will find a clickable link to that passage from the background file. For example, the Alleluia. Posui adiutorium is mentioned in three treatises and the background file provides a link to the relevant passages in Habito de ipsa plana musica , the De musica mensurabili , and Anonymous 4. The folios of practical sources are given in parentheses following the siglum for the manuscript, and if you click the dolphin on the background file screen, you will arrive at a List of Manuscripts that will describe the source in detail if you click the siglum on the search bar. However, I have occasionally found them useful for encoded musical examples that are not identified by text.