including all the LXDE versions of Lubuntu (18.04 LTS and earlier), Linux Mint as well as Puppy Linux. Features mtPaint includes a range of features for creating drawings and editing photographs. These include: Vertical and horizontal split views Wide range of shortcut keys 12 image clipboard "undo" up to 1,000 times Image zoom from 10% and 2000% Languages: Chinese (Simplified), Chinese (Taiwanese), Czech, Dutch, English (UK), French, Galician, German, Italian, Japanese, Polish, Portuguese, Portuguese (Brazilian), Russian, Slovak, Spanish, Swedish, Turkish Screenshot support 100 layers 81 brush shapes User defined gradients scaling and resizing images rotating, including arbitrary rotation angles effects including inverting, grayscale, isometric transformations, edge detect, sharpen, unsharp mask, soften, Gaussian blur, emboss and bacteria File formats mtPaint supports BMP, GIF, JPEG, LSS, PNG, TGA, TIFF, XPM and XBM formats for both loading and saving images. Reception mtPaint has been criticized for low discoverability of features, by users and even by the lead developer, Dmitry Groshev, who noted that its features, "may look opaque to users who do not like to read docs; but not everything in image processing can be made self-explanatory, particularly if one tries to keep the program small. Those features which aren't obvious, have explanations in the handbook; time spent looking them up will be well rewarded by not wasting time on learning things by trial and error." Some users have written their own guides to make up for deficiencies in the official mtPaint Handbook. A 2015 review on Softpedia noted that the mtPaint GTK interface looks "outdated", but concluded, "although it hasn't been updated for a while and the interface could use some work in the graphical department, mtPaint features some pretty advanced options to help you manipulate images." Reviewer Seth Kenlon praised mtPaint in 2017, writing, "what makes mtPaint great is that it specializes in pixel art, has a tiny footprint—the application is about 391k, compiled (assuming Gtk is installed separately)—and it is designed to run efficiently on specs as low as 200MHz CPU with 16MB of available RAM." Linux Experten noted, "due to its efficient design, it can run on older PC hardware (such as a 200mhz cpu and 32mb frame). It can edit indexed palette or 24 bit RGB images and offer basic painting and palette manipulation tools. It aims to be simple and easy to use." A review in Top Best Alternatives praised mtPaint's "efficient and simple interface". A 2017