To help with the common every day edits, I use xdotool to put directly into the Obmenu (~/.config/obmenu-generator/schema.pl) about a dozen Image Magick command templates. See http://lxlinux.com/imagemagick.html
for details, that only require copying and pasting to set-up. This creates the menu shown in the
To use this Image Magick submenu, open a terminal in the directory with the relevant images, then click the submenu entry, which will type into the terminal the words in the template for that command. You still need to complete the specific details like the names of the images and incomplete or unspecified format details. Click the return key and "bang!", there is the output in the same directory.