==== Center CoA ====

  * If you insert a smaller image into the 800 x 800 canvas, Paint 3D will center it by default
  * However, it will be centered as a rectangle - meaning, if you draw a circle around it, the CoA will not look centered
  * You need to think for the CoA to be rather a triangle, and then this would be centered if the 3 edges are at the same distance from the circle
  * So, as a rule of thumb, you need to lower the CoA a bit, for it to look centered
  * With some experience you can do this manually
  * But there are tools to calculate the exact position, and also templates for GIMP

==== Center non-CoA ==== 

  * This very much depends on the material you have - Guess & verify 
  * The 350 size CoA has transparant background, so it can overlap with the map (allowing it to be of that size)
  * Make sure the CoA does not overlap with the highlighted part of the map

==== Verify your work ==== 

  * When using Paint 3D, you can quickly draw a circle that fits into the canvas, to verify if the image looks centered
  * Press esc to make the circle go away again