Medieval Latin psalter manuscripts are closely linked to religious practices such as the Divine Office and private devotional practices. The core of these ritual practices were the biblical psalms contained in these manuscripts. However, the use of psalter manuscripts presents some challenges to the owners: access to certain psalms or groups of psalms was particularly important, for example, but, unlike modern books, medieval psalter manuscripts usually do not contain page numbers or running titles that would make it easier for the users to find their way through the manuscript. Nevertheless, a closer look reveals other aids that make it possible to find certain sections or highlight individual psalms. This article examines the correlation between the visual organisation and the (potential) use of these manuscripts in the Divine Office.