klik kanan convert image di thunar XFCE
convert %F -resize 800x600\> %f.resize
https://www.linux.com/training-tutorials/extend-xfces-thunar-file-manager-custom-actions/
https://docs.xfce.org/xfce/thunar/custom-actions
Convert PNGs to JPEGs
Name: Convert to JPEG
Command: convert %f -quality 75 %f.jpg
File pattern: *.png
Appears if selection contains: Image Files
Hint: "$(basename %f .png).jpg" will strip the old .png extension off of the original filename.