Mouse interaction with gnuplot canvas

Mouse movement
Track mouse coordinates
Mark current coordinates on plot
# Toggle grid lines (if present)
unzoom Unzoom (restores original plot)
rezoom Rezoom
1 Display/Hide plot #1
Firefox - Click and drag with right mouse button
Opera - Mouse buttons are problematic. To zoom you must set the middle-button mode to "Gestures". Click and release the middle button once to select one corner of the zoom box; then click a second time in the same place and drag to define the other corner.
Safari - Untested
IE - Untested