20. The non-transitory computer-readable storage medium of claim 15 , wherein the instructions further cause the processing device to: upon continued re-sizing of the media interface, determine that a total width of the media interface is large enough to display two primary content displays in the presentation pane; display an additional primary content display in the presentation pane in the media interface, wherein the vertical margin panes are reduced or removed to accommodate the additional primary content display; fade out the display of the note; and re-display the glyph in the presentation pane.
21. The non-transitory computer-readable storage medium of claim 20 , wherein the instructions further cause the processing device to: upon continued re-sizing of the media interface, scale the glyph in accordance with the dynamically measured size of the vertical margin panes, wherein the glyph is scaled according to a scaling factor correlated to the size of the vertical margin panes.