Display crosshair:
While selecting one line, hold the left mouse button: user can drag the crosshair.
Note: Do not press and hold at the intersection of the horizontal and vertical lines.
Double-click a single crosshair to set its color and position, center and delete.
Cross Mark
1. Click Crosshair tool
.
2. Select "Cross mark".
3. The image area will show a crosshair with notches.
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