A graphic image of raster map symbol consists of pixels, that is why the basic operation on editing the image of the element is the operation of changing the color of pixel (or pixels).
There are no separate graphic primitives in raster images: segments, polygons, circles (which can be removed, changed, etc.) similar to those which are available in vectorial images. The editor of raster map symbol has tools similar to those which are present in the editor of vectorial map symbol. Though they are used in the same way, the result is not separate primitives but a set of pixels of some definite color.
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