Compton has 3 big parts in its file.
We have an Arch Wiki page to learn even more.
Choose glx or xrender. Only if you have trouble with your graphical hardware.
We show how easy it is to make a new compton.conf to experiment with the settings and still keep the original compton file.
In above picture you see that the conky is transparent. If we do not use compton, it will NEVER be transparent.