ChBg is used for changing destop background pictures with some period. Each picture should have own settings for mode and period. ChBg have nice configuration UI writen by using of GTK+1.2x libraries. Can handle configuration files simply created by graphical setup or can by started by using of commandline parameters. ChBg now can act as screensaver (use -screesaver option) or can be used as xscreensaver hack (use option -xscreensaver). ChBg can do slideshow of pictures in own toplevel window , or you can redirect it to foreign windown with known windowid. ChBg have very good picture viewing facilities with thumbnail previews and slideshow option. From thumbanil preview windows you can remove, rename, scale selected images or change formats of selected images. It runs with Gnome, KDE and Nautilus.