ShowCursorTracker

is an option for Cell that specifies whether an elliptical spot should appear momentarily to guide the eye if the cursor position jumps.

Details

The default setting is ShowCursorTracker->True.
Line breaking is normally set up so that small changes to expressions in input cells rarely cause large‐scale reformatting; the cursor tracker appears whenever reformatting is required that makes the cursor position jump.
The cursor tracker is intended to be sufficiently eye‐catching to make the low‐level human visual system cause an immediate shift in gaze.

Examples

Here is a sample expression cell:

This turns cursor tracking on in the sample expression cell:

Add and delete a character a few times in the sample expression cell:

Here is another sample expression cell:

This turns cursor tracking off in the sample expression cell:

Now the cursor tracker does not appear when you edit the sample cell:

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