Y positions of the holes to be drilled on the Optopus starplate. The plate is needed. The result is not always optimal. For this purpose, a cursor is activated in the graphic display. However, it is also useful to check to review outliers and close pairs repetetively.
Some users like to start their Optopus session with an populated field of candidate source.
They then proceed to eliminate objects until a suitable number is reached. However, care should be taken to avoid eliminating more objects than necessary in cases where several targets are closely grouped together. It then may happen that one is forced to a late rejection of more scientific targets than one would have liked. In most cases the default zoom factor of 5 is sufficient to resolve close groups or pairs. This optimalisation has to be made in advance.