Grow Method

Increases the font size to the next available size. If the selection or range contains more than one font size, each size is increased to the next available setting.

expression    Required. An expression that returns a Font object.

Example

This example increases the font size of the fourth word in a new document.

Dim rngTemp As Range

Set rngTemp = Documents.Add.Content
rngTemp.InsertAfter "This is a test of the Grow method."
MsgBox "Click OK to increase the font size of the fourth word."
rngTemp.Words(4).Font.Grow

This example increases the font size of the selected text.

If Selection.Type = wdSelectionNormal Then 
    Selection.Font.Grow
Else
    MsgBox "You need to select some text."
End If