I've not used that one.
But normally you hit program or hold it down.
The area you are fine tuning might flash or maybe it doesn't.
If it flashes on the days then keep singularly pressing week button until all days are showing.
Then select the hour and minute for the start time.
That should then give you the first ON time
Hit the programme button again and it should say OFF
Then adjust the day again so all are showing.
Then the hour and minute again.
That should give you your OFF time.
Hit programme again and it should go to programme number 2. Which you don't need , so keep hitting the programme button and it will cycle through ON -OFF for all 20 programmes until it goes back to the time.
Which you can set if you haven't already.
Then make sure it is set to auto
MAKE SURE ALL DAYS ARE ON AND OFF OR IT MIGHT NOT TURN OFF ON SOME DAYS