drawing direction problem

[liufy11]

when I use RIdeogram, I found it draws picture from up to down. so the start position is above the stop position. but the start position of different chromosomes is not on the same horizontal line， so It is impossible to draw a Y-axis for physical distance. Is there any parameter can be used to make drawing from down to up. so that all chromosomes start at botton. and I can draw Y-axis by myself. thanks.

[liufy11]

or if I don't change the drawing direction but move all the chromosomes to start at a same horizontal line ?