The presentation toolbar has buttons to insert a add, duplicate and delete a slide, as well as to change the slide layout, so this toolbar shouldnt be hidden when a user goes into Outline view.
@Jay, not opposed to the idea of having the "Presentation" toolbar present while in outline mode, it makes sense and for now would be a simple toggle. But, aren't we still working toward suppression of the toolbars, in favor of implementing .ui based button widgets in the "Slides" preview/sorter panel? This could be achieved if we implement something for bug 89668 - "SLIDE PANE: Move slide manipulation buttons to the bottom of the pane"? With additional UI work on the "Slides" panel to place the mode tabs, or combobox of bug 87672 - "Moving Impress view tabs to slide pane".
(In reply to V Stuart Foote from comment #1) > But, aren't we still working toward suppression of the toolbars, in favor of > implementing .ui based button widgets in the "Slides" preview/sorter panel? Yes once the slide management controls are in the slide pane (bug 89668), this toolbar would be hidden always.