Here the tool size can be set in image pixels. Please note that the size of the tool as displayed on screen depends also on picture resolution and display magnification. The tool appears larger the lower the picture resolution or higher the display magnification.
With the [Esc] key the mouse pointer can be switched to show the size of the tool directly.
The following examples show how display size and tool size are related.
Tool size: 90
Picture resolution: 100 dpi(!nl) Magnification: 100 %
Tool size: 15
Picture resolution: 100 dpi
Magnification: 100 %
Tool size: 90
Picture resolution: 200 dpi
Magnification: 100 %
Tool size: 90
Picture resolution: 100 dpi
Magnification: 80 %
Since the tool size is always specified in image pixels, a distorted tool shape will result if the picture itself is distorted. The processed area will then no longer appear circular but elliptical:
Picture stretched horizontally
Picture stretched vertically
Note: Please note that working speed depends mainly on the quantity of data being processed, that is on the size of the tool. So when working on a full page display, too, the processing of a high resolution picture with large tools can become somewhat slow.
