File > Revert… (Mathematica Menu Item)

Revert restores the current notebook to its last saved version.

Format > Screen Environment (Mathematica Menu Item)

Screen Environment determines which style environment to use for onscreen display.

Cell > Convert To > StandardForm Display (Mathematica Menu Item)

StandardForm Display displays a selection in Mathematica StandardForm.

Evaluation > Start Kernel (Mathematica Menu Item)

Start Kernel starts the specified kernel.

Help > Welcome Screen... (Mathematica Menu Item)

Welcome Screen opens the Welcome Screen, which appears by default each time you start Mathematica.

Help > Wolfram Website... (Mathematica Menu Item)

Wolfram Website opens the main Wolfram Research website in a web brower.

Format > Word Wrapping (Mathematica Menu Item)

Word Wrapping opens a submenu of word wrapping styles

AutoIndent (Built-in Mathematica Symbol)

AutoIndent is an option for Style and Cell that specifies what automatic indentation should be done at the beginning of a new line after an explicit return character has been ...

AutoOpenPalettes (Built-in Mathematica Symbol)

AutoOpenPalettes is a global option that specifies the palettes that are automatically opened when Mathematica is started.

Booleans (Built-in Mathematica Symbol)

Booleans represents the domain of Booleans, as in x \[Element] Booleans.