Texas Instruments TI-Nspire CX II Manual Book page 26

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4. Press at the point to start the search. The tool shades the range.
If the search region you specified includes the point of interest, a label for the point
is displayed. If you change a graph that has points of interest identified, be sure to
check for changes in points of interest. For example, if you edit the function on the
entry line or manipulate a plot, the point where the graph intersects zero can
change.
The labeled points of interest remain visible on the graph. You can exit the tool by
d
pressing
22 Using the Scratchpad
or choosing another tool.