While viewing a graph, press to
lock the cursor onto a function.
The coordinates of the cursor's location appear at
the bottom of the screen if
(x,y) is selected
by pressing . (To return to
the menu after selecting this option
to move the cursor
along the graph from one plotted point to the next.
Note: Press or
moves the tracing cursor to the next function.
The cursor moves to the new function at the same x value.
If a graph takes goes off the display screen to
the top or bottom, the cursor will not follow it off the screen. However, the
x and y coordinates of the point on the graph, not the cursor location,
are displayed at the bottom of the screen.