HP 50g Graphing Calculator - Manual (Page 429)

Page 12-46
DEL
This command is used to remove parts of the graph between two MARK
positions. Move the cursor to a point in the graph, and press
@MARK. Move the
cursor to a different point, press @MARK again. Then, press @@DEL@. The section of
the graph boxed between the two marks will be deleted.
ERASE
The function ERASE clears the entire graphics window. This command is
available in the PLOT menu, as well as in the plotting windows accessible
through the soft menu keys.
MENU
Pressing @MENU will remove the soft key menu labels to show the graphic
unencumbered by those labels. To recover the labels, press L.
SUB
Use this command to extract a subset of a graphics object. The extracted object
is automatically placed in the stack. Select the subset you want to extract by
placing a MARK at a point in the graph, moving the cursor to the diagonal
corner of the rectangle enclosing the graphics subset, and press
@@SUB@. This
feature can be used to move parts of a graphics object around the graph.
REPL
This command places the contents of a graphic object currently in stack level 1
at the cursor location in the graphics window. The upper left corner of the
graphic object being inserted in the graph will be placed at the cursor position.
Thus, if you want a graph from the stack to completely fill the graphic window,
make sure that the cursor is placed at the upper left corner of the display.
PICT
This command places a copy of the graph currently in the graphics window on
to the stack as a graphic object. The graphic object placed in the stack can be
saved into a variable name for storage or other type of manipulation.