Clicking on the small palette icon (found at the top right of the document window) or typing Command-T displays the Tool Palette, which contains nine popUp menus. These are, left to right, the File menu, Utility menu, HyperText menu, Anchor menu, Form menu, Table menu, Heading menu, Style menu, and on the far right, the Preview menu.
The question mark button is the Palette Help button, which displays a graphical description of the palette functions complete with Command-key shortcuts. Clicking on the question mark button while holding down the Option key displays a graphic labelling the parts of HTML.edit's editor window elements.
Back to Preferences, on to File menu, or return to Tool Palette Menus.