With ZX-Paintbrush, you can load existing or create new SCR (screen files), draw images with mouse-sensitive tools like circles, rectangles, polygons etc. You have different fill styles available in tool boxes and you can alter the colour attributes very easily. Also, transparent colour effects are available.
ZX-Paintbrush also can be used as a font editor for Sinclair fonts (using 256 characters) with either 4×8, 6×8 or 8×8 (standard) pixels. You can read/write corresponding font files CH4, CH6, CH8 or CHR and also CHX files directly.
For more details, check the links below: