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2b. Adjust the brightness by pressing the left button on the mouse and dragging it to the
right and left. Dragging to the right on the Brightness button increases the brightness;
dragging it to the left decreases it. While viewing the image, perform adjustments until an
appropriate brightness is attained. Even when the cursor moves out of the button, the
adjustment can be continued until the left button on the mouse is released.
NOTE
: The brightness of an image varies from one specimen to another. For a given
adjustment, the brightness changes with the specific site being observed and the
particular magnification employed.
4.3.19 Contrast Button
Figure 4.3.19-1 Contrast Button
Adjust the contrast for the observation screen. To increase the contrast from the current
adjustment value, click the + side of the button. On the other hand, to reduce it, click the –
side. Continuing to click the button causes the contrast to change continuously. The current
contrast is displayed by the indicator located below the button. The longer the green indicator,
the stronger the contrast, and the shorter the indicator, the weaker it is.
In addition, the contrast can be adjusted by dragging the mouse on the contrast button.
1. Contrast Adjustment
Figure 4.3.19-2 Contrast Adjustment
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