Change marker size dialog
This dialog is used to change the size of the square shaped marker used for marking
out invalid regions in the image.
Use the toolbar button or 'Edit Image->Change Marker Size' menu option to access this dialog.
The option is only available if an image is loaded.
The default Marker type is Set Color As Background.
To use this marker to mark invalid regions, use the toolbar button or
'Edit Image->Change Marker Type->Set Region As Background' menu option.
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Horizontal scrollbar
Use this scrollbar to change the size of the marker. The size and the image of the marker
is displayed above it.
The default marker size is 1 pixel.
(Marker size range: 1 to 185 pixels)