lavalais
If you do not have physical home switches then you will not see the Home switch LED on the diagnostics page.
The only way you can home without switches is to move to a known location and press the RefAll button, that will set the machine coords at that point.
CliffL
By homing you set the machine coords, they will zero if you have Auto Zero chosen and have Zero for your Home Off.
Your work coords may be different but if you want them to be the same then you simply home the machine then you can zero the X Y and Z work offsets by pressing the zero button at the side of each DRO. Your work and machine coords will now all be zero.
Hood