LeCroy LC Series Operator's Manual page 134

Parameter Display — Quad Grid — Full-Screen Mode: trace information normally contained in the
.
trace labels is arranged beneath the grid in Full Screen
Pressing expands the grid display to fill the entire
screen. Pressing this button again returns the grid to its normal
size. Pressing RETURN in Full Screen mode removes the
menus from view so that waveforms can be viewed in their
entirety. These reappear when you press one of the Menu-entry
buttons.
ISSUED: December 1999 LCXXX-OM-E Rev K