I've just started experimenting with LXDE in Fedora 21 and was surprised to find out that I can toggle tap-to-click in the configuration of Xfce but not in LXDE, where there is no tap-to-click out of the box.

I repeat: There is seemingly no GUI way to toggle tap-to-click in LXDE. I'd love to be wrong, but I fear I am not.

There is more than one way to turn tap-to-click on with scripts, or modifying xorg.conf or files in xorg.conf.d.

I just wanted something simple. I turned to the synclient utility (using it in the terminal).

First of all you can use synclient to check your setup:

$ synclient -l

And to turn on tap-to-click:

$ synclient TapButton1=1

Like I say above, there are ways to do this via Xorg, and probably other ways, too.

I'm not sure whether or not there is a GUI in LXDE to autostart scripts, but I notice that one of the choices in LXDE's Desktop Session Settings is Xfsettingsd, the Xfce Settings Daemon. Could that bring some of my Xfce settings into LXDE? It's probably worth a try.

But for now, just running synclient TapButton1=1 in the terminal gets me where I want to be.