Select one X column and at least two Y columns.
Select required data.
Select Plot > Specialized : Bullet Chart/Vertical Bullet Chart/Normalized Bullet Chart.
When you selected the required data and chose the menu above, a dialog "Plotting: plotbullet" will be opened to allow you adjust the spacing between and around the layers.
Bullet.otpu ; BulletVerti.otpu ; BulletNormal.otpu (installed in the Origin program folder)