Set Color: Click to select a new color for the crosshair cursor.
For a live image, the cursor may not appear to be displayed in the selected color. Experiment with the cursor color until it is clearly visible.
Diameter: The circle is drawn as close as possible to the specified size; accuracy depends on the micron to pixel ratio of the current lens.
Neurolucida always records the circular cursor size during tracing.
To view the line thickness:
It is often useful to set the cursor to a known size for a rapid comparison of objects on the screen.
If you set the size in microns, the cursor changes size when a new lens is selected; its size remains constant when set in pixels.
Change the thickness to make it easier to see on the screen.