Enhanced Scatter plot challenges - a) dynamic axes ; b) absolute buble size

Hi,
can anyone give me advise on this? I am working with the Enhanced scatter visual from Microsoft and facing some challenges along the way.

1) I am trying to fix axes in Enhanced Scatter visual from Microsoft based on specific values. To be concrete all time Min an Max values. I tried to set Start X,Y and End X, Y in numerous ways a) Measure; b) Additional table, c) Min, Max from original values. Neither of these options brings any change to the axes dymensions. They just automatically adjust according to data.

2) It is a feature of this visual to influence the size of the shape (implicitly bubble) with chosen field... But is there any option or workaround to influence the absolute size of the shape? At this point the bubble is too big for my purpose and there is no option as in the normal Scatter to fine-tune the size (found in the shape options).

Thank you so much.
Marek