Thanks for the suggestion, Danny.
Unfortunately when I drag the pivot point it drags the line too and the pivot point remains in the centre of the line.
Good suggestion though.
PS Just tried Free Transform again. Stretching the box vertically or horizontally can give the same effect as rotating the line with one end fixed if on a separate layer. This is almost as good as the Paintshop Pro function. But typically I will draw half a dozen perspecive lines from the same vanishing point and I would have to crate a seperate layer for each.
Doug