Edit > Check Balance (Mathematica Menu Item)

Check Balance expands the selection to cover the nearest pair of matched bracketing characters.

[Right-click] > Version Advisory (Mathematica Menu Item)

Version Advisory checks for input from previous versions of Mathematica that should be updated for compatibility with the current version.

CheckAbort (Built-in Mathematica Symbol)

CheckAbort[expr, failexpr] evaluates expr, returning failexpr if an abort occurs.

DirectoryQ (Built-in Mathematica Symbol)

DirectoryQ["name"] gives True if the directory with the specified name exists, and gives False otherwise.

FileExistsQ (Built-in Mathematica Symbol)

FileExistsQ["name"] gives True if the file with the specified name exists, and gives False otherwise.

ImageSizeAction (Built-in Mathematica Symbol)

ImageSizeAction is an option for Pane and related constructs that specifies what to do if the specified ImageSize setting does not match the size of the contents.

Majority (Built-in Mathematica Symbol)

Majority[e_1, e_2, ...] gives True if the majority of the e_i are True, and False if the majority are False.

MultilaunchWarning (Built-in Mathematica Symbol)

MultilaunchWarning is a global option that specifies whether a warning is given when you try to modify user preferences while running two copies of Mathematica simultaneously.

Needs (Built-in Mathematica Symbol)

Needs["context`"] loads an appropriate file if the specified context is not already in $Packages. Needs["context`", " file"] loads file if the specified context is not ...

SyntaxQ (Built-in Mathematica Symbol)

SyntaxQ["string"] returns True if the string corresponds to syntactically correct input for a single Mathematica expression, and returns False otherwise.