Cell > Grouping > Ungroup Cells/Group ... (Mathematica Menu Item)

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

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

Why the Beep? opens a dialog with an explanation of why the front end produced a beep.

AllowInlineCells (Built-in Mathematica Symbol)

AllowInlineCells is an option for cells that specifies whether inline cells are permitted within a cell.

AnchoredSearch (Built-in Mathematica Symbol)

AnchoredSearch is an option for Find and FindList that specifies whether the text searched for must be at the beginning of a record.

Back (Built-in Mathematica Symbol)

Back is a symbol that represents the back of a graphic for purposes of placement and alignment.

BoxFormFormatTypes (Built-in Mathematica Symbol)

BoxFormFormatTypes is a global option that specifies the list of typeset format types that are currently defined.

CellGroupingRules (Built-in Mathematica Symbol)

CellGroupingRules is an option for cells that specifies the rules used for grouping a cell.

Clock (Built-in Mathematica Symbol)

Clock[] represents a clock variable whose value cycles continuously from 0 to 1 once per second when it appears inside a dynamically updated object such as a Dynamic. ...

Context (Built-in Mathematica Symbol)

Context[] gives the current context. Context[symbol] gives the context in which a symbol appears.

Contexts (Built-in Mathematica Symbol)

Contexts[] gives a list of all contexts. Contexts["string"] gives a list of the contexts that match the string.