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To draw a circle on the current grob, To toggle a line segment on the current grob, Editing and erasing a picture – HP 48g Graphing Calculator User Manual

Page 112: To erase an entire picture, To erase a rectangular area of the picture

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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

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