xv (software) - Wikipedia
xv is a shareware program written by John Bradley to display and modify digital images under the X Window System. While popular in the early 1990s ("XV is widely considered to be the preeminent image viewer for the X Window System"), no official releases have been made since December 1994. As a result, the user can easily undo operations (such as cropping, color modifications, filtering) out of order, rather than only being able to undo the respective last operation. While this concept limits what xv can do compared to some alternatives, the functionality it provides can be applied very conveniently and efficiently.Until at least 2000, Bradley collected third-party updates to xv, for example, support for the PNG image format.xv can be used also for image manipulation (cropping or stretching of images and other effects), supports various image file formats (including among others Sun Raster, or Targa) and allows export to PostScript.xv is a shareware program written by John Bradley to display and modify digital images under the X Window System. While popular in the early 1990s ("XV is widely considered to be the preeminent image viewer for the X Window System"), no official releases have been made since December 1994.