Hey Dan,
why don’t you simply use forum search engine functionality and read one of the many answers to this most frequently asked question, e.g. here:
or many practically identical answers? One of the many answers to this question is even only two posts above yours.
Anyway, there’s no reason to fear inserting a simple but comfortable g-code example into the ‘tool-change’ field of the General Configuration Tab, as described here. G-code is not rocket science 
, and with a tested example you can break nothing. You can mill air to test the example and see if it’s comfortable enough for you.
I would try the second example, it is made for the Onefinity Touch probe height.
It is made for the case where you touchprobe on your workpiece top (=part zero is on workpiece top). Should you touchprobe on the machine bed instead (=part zero is at wasteboard height =at workpiece bottom), simply remove the “G0 X0 Y0” line. Probing will then be done at machine home position.