Because I'm not sure how to set directories when I compiled it from source, the default location to put backgrounds is /usr/local/share/lxlauncher/background. (not ideal since you need root privileges)You add them and rename them to tab names (menu directory names) such as Accessories.jpg. Every tab gets its own background. I reworked the lxlauncher menu to get the tabs I wanted. I made a pcmanfm action to change wallpaper on my main tab (LXlauncher) using
I just like to play around. I set the group permissions on the background folder for lxlauncher to me so I don't need root permissions to copy into it, I made some scripts using xenity for the back end, and made the front end with tint2. Works for changing all the tabs backgrounds.