HP 48g Graphing Calculator - Manual (Page 112)

To draw a circle on the current grob:
1. From within the Picture Editor, move the cursor to where you want
the center of the circle,
2. Press Q (or M A R K o r C I R C L ) .
3. Move the cursor to any point on the perimeter of the desired circle
and press C I R C
To toggle a line segment on the current grob:
1. From within the Picture Editor, move the cursor to one endpoint of
the segment.
2. Press (3 (or M F i R K o r T L I H E ) .
3. Move the cursor to the other endpoint and press T L . I N F E . All pixels
between the mark and the cursor are toggled—those that were on
are now off, and vice versa.
as a
Editing and Erasing a Picture
To erase an entire picture:
■ While viewing the picture press fNXT"| E R i i S E (or f<^fCLEAR)
shortcut).
To erase a rectangular area of the picture:
1. Move the cursor to one corner of the rectangular area to be erased,
and press (or DtL ) to mark it.
2, Move the cursor to the opposite corner of the rectangular area.
3. Press fNXT~)
(or ÍDEll as a shortcut).
To copy a rectangular area of the picture to the stack:
1. Move the cursor to one corner of the rectangular area you want to
copy, and press (or SUEi ) to mark it.
2. Move the cursor to the opposite corner of the region.
3. Press fiMXT) (NXT ) SUB . The area is copied to level 1, and the
picture remains in the display.
To superimpose a second grob on top of the current one:
1. Put the second grob on stack level 1.
9-4 Graphic Objects