Image Filters

When using imported image as a template for map drawing, it can be useful to make it brighter, darker or less saturated to allow objects drawn on the top to be more visible and thus make the work more comfortable.

Original raster image

Use the main menu > Image > Background Filters window to adjust brightness or colors saturation. In this case the Gamma parameter was adjusted to make image brighter.

Image color filters

Background image is much brighter, while all detail is still visible.

Filtered image