Break
(Built-in Mathematica Symbol) Break[] exits the nearest enclosing Do, For, or While.
ButtonNotebook[] gives the notebook, if any, that contains the button which initiated the current evaluation.
CellDingbat is an option for Cell which specifies what dingbat to use to emphasize a cell.
CellEventActions is an option for Cell that gives a list of actions to perform when specified events occur in connection with a cell in a notebook.
ChartLabels is an option for charting functions that specifies what labels should be used for chart elements.
Circle
(Built-in Mathematica Symbol) Circle[{x, y}, r] is a two-dimensional graphics primitive that represents a circle of radius r centered at the point x, y. Circle[{x, y}] gives a circle of radius 1. ...
ConversionRules is an option for Cell that can be set to a list of rules specifying how the contents of the cell are to be converted to external formats.
DistanceTransform[image] gives the distance transform of image, in which the value of each pixel is replaced by its distance to the nearest background ...
DynamicWrapper[e, expr] represents an object that displays as e, but dynamically updates the expression expr whenever that object is visible on screen.
EmitSound[snd] emits the sound snd when evaluated. EmitSound[{snd_1, snd_2, ...}] emits each of the sounds snd_i in sequence.