Dolphin service menu to quickly append selected images top to bottom. Requires ImageMagick's convert utility.

This menu option will try to append selected images vertically (top to bottom) and save resulting image in working directory with filename `appended-$UNIXTIME.jpg`, where `$UNIXTIME` is replaced with current Unix time. Unix time is used to avoid overwrites when appending multiple times in same working directory in a simple way. If, for some reason, it is impossible to save resulting image in current working directory save to `/tmp` will be attempted, with filename created in same way.