At the top of the main editor window, Radical Pie displays 17 palettes that contain all sorts of mathematical symbols and the various structures that may appear in an equation. Clicking on a palette button brings up a menu containing its symbols and structures.
When the mouse hovers over a particular palette entry, three pieces of information about that entry are displayed in the bar at the bottom of the palette:
If you have the means of entering Unicode characters directly, either with a special keyboard or by entering hex values on the numeric keypad, then typing the character with the Unicode value associated with a palette entry directly in an equation has the same effect as selecting the entry from its palette.
Some palette entries, especially those in the Greek palette, have keyboard shortcuts that begin with Ctrl+G but also show another character following an arrow. This means that the symbol can be entered in an equation by first typing Ctrl+G and then typing the character appearing after the arrow.
The following icons at the top of the editor window represent the 17 different palettes.