How do u set the PLOT AREA to nearest mm in Excel Scatter Graph .
 

I wish to plot x-y scatter graphs to scale e.g. on a landscape A4 size page.
I need the y (vertical) axis to be exactly 99mm long and the x (horizontal)
axis to be exactly 240mm long.

As I cannot find rulers in Excel I insert the graph in Word and turn on the
rulers. I then stretch the €œchart area€� until the axes are the correct length.

This usually works. However, sometimes it does not work e.g. the y axis
might be around 20mm too long for no apparent reason but the x axis will be
correct. I also notice that if a text box overlaps an axis the length of the
axis changes.

Is there another way of achieving graphs to scale? Can the size of the €œplot
area€� be set precisely?

Can you also let me know if there is some sort of €œshow all characters€�
command in Excel, which could be used to identify empty text boxes, which are
invisible?