Positionning a in text graphic verticaly

[Jean-Paul]

Hello,
My English is very bad, so I'm not sure I respect all the rules of the forum and hope you will forgive me.
My problem is the following:
I place a graphic (containing a mathematical formula), by copying it from a GraphicBox, in a line of text of a TextBox. When the graphic is higher than a line of text, I position the graphic vertically using one of the variables of the advanced parameters of the text properties. The graphic is then positioned at the height I want, but the whole line does not move vertically taking into account the offset introduced.
How to solve this problem?
I use Scribus 1.6.2 under Windows 10
Regards