Rotate text in graph mode

Hello

I would like to rotate text in the graphing mode. I know how to rotate an objetc (box ,…) but i cannot do it the same for a text or formula.

Any help will be welcome

Cheers

I tried a bit and I did not succeed. I also tried by grouping the text with a line and then rotating the whole group: in this case the text rotated together with the line around a center (which I assume is the center of the group) but maintaining its upright orientation, while the line rotated “completely”. Maybe a hint from the developers on this would be nice.