Specifies the font size (in half-points) for applying to the selected text.
property FontSizeDouble: Integer;
If UserInterface=True, the action displays a font dialog (initialized with font properties of the selected text); if the user changed value of this property in the dialog, rvfimSize is included in ValidProperties, and the action applies this property to the selected text.
This property is applied to the text style's (RVStyle.TextStyles) property SizeDouble.
When you assign this property, Font.Size is updated.