>>3272090I use darktable, running a debian minstall on a 2010 business laptop (poorfags unite!)
To do the slider thing
>Open image in Darkroom tab>Left side of screen, expand History menu>Scroll down, find Original (0), and select this>Expand Snapshots menu>Click "Take Snapshot">Go back down to history, select the version you want to compare with>???>PROFIT!!!Gotchu, boo.