[Right-click] > Paste into Graphic (Mathematica Menu Item)

Paste into Graphic inserts the current contents of the clipboard into the selected (or clicked upon) graphic.

Evaluation > Quit Kernel (Mathematica Menu Item)

Quit Kernel quits the specified kernel.

[Right-click] > Reset Pan/Zoom (Mathematica Menu Item)

Reset Pan/Zoom resets the pan and zoom for the selected 3D graphic.

File > Printing Settings > Show Page ... (Mathematica Menu Item)

Show Page Breaks calculates and displays page breaks on screen.

Window > Stack Windows (Mathematica Menu Item)

Stack Windows arranges windows in a uniform overlapping stack on the screen (Windows and Macintosh only).

Insert > Typesetting (Mathematica Menu Item)

Typesetting opens a submenu of common typesetting actions.

Ungroup Cells/Group Normally ungroups the selected sequence of cells.

Help > Why the Coloring?... (Mathematica Menu Item)

Why the Coloring? opens a dialog that explains any syntax coloring in the active notebook.

AngleBracket (Built-in Mathematica Symbol)

AngleBracket[x, y, ...] displays as \[LeftAngleBracket]x, y, ...\[RightAngleBracket].

Antialiasing (Built-in Mathematica Symbol)

Antialiasing is a Style option which specifies whether antialiasing should be done in rendering graphics.