++ Menu Tabs

++ Toggle Ed./Prev.
Switch between editor and preview mode in current tab.

++ Enter Edit Mode
Shows editor in current tab.

++ Enter Preview Mode
Shows HTML preview.

++ Show Folding
Shows/hides an additional margin to the left of the editor to control folding. See [Folding].

++ Toggle Current Folding
Fold/Unfold current line and following.

++ Unfold All
Unfold all lines.

++ Fold All
Fold all lines.
