Hi, when editing a slide master, it comes, by default, with three footer areas, i.e. date/time, footer, and number. It's possible to delete these areas by selecting them and pressing the delete button. But then it is impossible to re-enable them. Even when you choose the Insert->Header and Footer menu and reenable them, they are shown on the little preview slide in the header-and-footer-window, but do not re-appear in the master. A completely new master must be hand-crafted from scratch.
Hello Hadmut, You can use Insert - Field - (The field you want to insert) Closing as RESOLVED NOTABUG
These fields are not corresponding to the standard footer. I.e. there is no <footer> field.