Yes, this can be inputted during the auto-setup sequence or, if required at a later date, can be inputted or altered via the settings menu.
Advanced settings should only be adjusted by a competent person, the wrong configuration can have a detrimental effect on the thermostat and the heating system.
The boiler starts heating in advance of schedule so heating reaches the required temperature at the time specified
The boiler stops heating in advance of schedule so heating reaches the required temperature at the time specified
If the room temperature is close to target temperature the heating start time is delayed to save energy.