Welcome to the LMMS Wiki! Here you'll find the documentation, tutorials, guides, resources, and much more.
Manual [wiki] [pdf] (for v0.4.12)
How to Report Bugs
Developers (Wiki on GitHub)
Creating a Theme
Theme Porting Guide
If you want one window to stay in front while working with other windows, for example to see the FX mixer when the Song Editor is full screen, right click on the header in that window and choose "stay on top".