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Create Table/Matrix/Palette...

Create Table/Matrix/Palette sets up an empty

object.
Table
Makes a

with no special options.

Matrix
Rows and columns are the width of the widest element with parentheses around the matrix.
Palette
Makes a

filled with buttons, with various options set to give the appearance of a palette.

Fill with
Sets the initial values for the elements with the specified value.
Fill diagonal
Sets the initial values for diagonal elements with the specified value. Can be used in conjunction with "Fill with".
▪ See also: GridBox.
▪ Keyboard shortcuts: C ; C C