Vertical offset of text item of this style, in percents of text height.
property VShift: Integer;
Vertical offset is counted relative to the base line of text. Normal text items have VShift=0.
Use positive values to move text up, negative values to move text down.
This property can be applied not only to normal text, but to subscripts and superscripts (the effect is cumulative).
▪TRVExtraItemProperty type (rvepVShift)