# The Bubble (2D) chart. How to control the drawing of circles

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Hi All!
Challenge: You want to display three circles with diameters 1.0, 1.5 and 2.0. Using Bubble (2D) we get the following picture:
. Obviously, QM by default draws circles so that their areas are related as squares of diameters, which is true mathematically, but incorrect financially and economically.
Here’s how this problem looks, eg, in Tahir’ video on his YouTube channel:
. You see, the sales of the USA and Germany differ twice. But the areas is four times.
Q1: is it possible to force QM to draw circles so that their areas are visually perceived as relations of given diameters?

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Here my answer to Q1. Yes, its possible.
To do this, perform the following conversion of the original circles diameters:
1.   from the list of source circles select one circle as the base circle and
2.   use its diameter to express the diameters of all the circles in the list. The resulting list of converted circles diameters should be submitted for drawing.
See how it works:
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Here’s how it works for Tahir’s case:
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By the way, pay attention to the output of labels just above the center of the circle. Next time, I will demonstrate the vertical offset output of labels.