Insert > Typesetting > End Subexpression (Mathematica Menu Item)

End Subexpression moves the cursor from a subexpression to the expression at the n\[Null]^th level.

Insert > File... (Mathematica Menu Item)

File inserts the contents of a file at the insertion point.

Insert > Table/Matrix > Make Spanning (Mathematica Menu Item)

Make Spanning combines the selected entries from a formatted grid into a single spanning entry.

Insert > Table/Matrix > Split Spanning (Mathematica Menu Item)

Split Spanning divides a spanning entry from a formatted grid into separate entries.

RectangleChart (Built-in Mathematica Symbol)

RectangleChart[{{x_1, y_1}, {x_2, y_2}, ...}] makes a rectangle chart with bars of width x_i and height y_i. RectangleChart[{..., w_i[{x_i, y_i}, ...], ..., w_j[{x_i, y_j}, ...

SetProperty (Built-in Mathematica Symbol)

SetProperty[{obj, item}, name -> value] sets the property name -> value for item in obj.

Insert > Table/Matrix > Add Column (Mathematica Menu Item)

Add Column adds a column at the cursor's insertion point in a table or matrix.

Insert > Table/Matrix > Add Row (Mathematica Menu Item)

Add Row adds a row at the cursor's insertion point in a table or matrix.

Insert > Cell with Same Style (Mathematica Menu Item)

Cell with Same Style creates a cell below the current cell with the same cell style.

Insert > Color… (Mathematica Menu Item)

Color opens a dialog for choosing a color.