I haven't used QlikView 9.0 but in 8.0 , you can identify the points manually & then if you hover the mouse over the required point, on the right hand botton , you can see the x & y co-ordinates for the required point. You can give values to the X & Y coordinates accordingly & use it as the first two expression's in the expression tab & the third expression is the value for the co-ordinate (which identifies the size of the object)
See if this help's. Or go in Getting Started & see a sample example.
