Touchpad settings: what do they mean?

Here is what I have:
A Toshiba Satellite 870.
Windows 8 (UGH)
Synaptic ClickPad V1-5
What do the various settings do, and where can I find out this out?
For example the wheel settings: the number of lines at a time for scrolling vertical and horizontal.
What does that even mean?

Any links that explain what the functions are?

Also, my touchpad randomly disables on its own. I've reinstalled the driver, and I then have to enable it in the device settings.
F-5 does not work when this happens.

Thanks in advance

Sharon