SSImXel provides three ways to generate new images.

New

Creating any resolutions of new image with built-in template pattern such as ramp, zoneplate, b/w checker, color bar and color chart

New RGB24 from ClipBoard

Creating new image from system's clipboard which is copied from other image tool or SSImXel

New Raw from ClipBoard

Creating new bayer(raw) image from SSImXel's clipboard which is copied by SSImXel