Wie wäre es, wenn du einfach mal die Anleitung lesen würdest?
• Using Afloat
Once enabled, you will find Afloat’s commands in the Window menu (“Keep Afloat”, “Always
on Top” and “Transparency”). In applications that have Afloat commands, you will also
be able to change the transparency and move windows without dragging from the title bar,
as described above.