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Chapter 7 – Image Data Handling
Ellipse
Enables ellipses to be drawn. Position the top left corner of the rectangle that describes the ellipse
as desired, then depress the left mouse button to create an ellipse of the desired size. Right-click
to superimpose the box.
Line
Enables straight lines to be drawn. Position the mouse cursor at one end of the desired line, left- or
right-click, and move the cursor to the opposite end, then click again.
Arrow
Enables variable arrows to be drawn. Position the mouse cursor at the desired start position of the
arrow. Pressing the left or right mouse button and moving the mouse, the arrow length and its direction can be varied. Click the mouse button again to superimpose the arrow.
Polyline
Click on this button to draw a polyline into the overlay. Keep the left mouse button pressed and
move the mouse to draw freehand. Define the polygon point by point by clicking the left mouse
button on each point. Straight lines then connect points automatically. Right-click to confirm the
polygon.
Polygon
Click on this button to draw a polygon into the overlay. Keep the left mouse button pressed and
move the mouse to draw freehand. Define the polygon point by point by clicking the left mouse
button on each point. Straight lines then connect points automatically. Right-click to connect the
end points of the drawn line automatically to form the polygon.
Highlighter
Click on this button to place a colored transparent foil on an image section. Using this option you
may effectively emphasize special image features. Drawing is done as for Rectangles. If you
choose "Invert" instead of a color in the Object Properties dialog for a highlighter, the highlighted
image section will be inverted.
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