By using some code in Python console, you can quickly extend what you can do in the GUI.
1. To specify the size of Point Set:
open a Python console, type
then drag your Points annotation, you'll get something like
p = orsObj('7acf60ba83bb495ca159bb9a5bf1990aCxvPrimitive_Points')
You can then do this:
to see the current value, and
(0.005 for example) to change the value.
2. To specify the world position of a Point:
Again, get the object by dragging it to the console:
p = orsObj('2d3f420cd6fc422c9389821c8a01ecf3CxvPrimitive_Points')
You can then obtain each point's position by doing this:
pos = p.getControlPointPositionAtIndex(NN, 0, None)
where NN is the 0 based index (in the UI they start at 1)
You can change a position by typing
p.setControlPointPositionAtIndex(NN, 0, pos, None)
Please note that units are always in meters in the Python Console.