I agree the instructions are not the best around and page 45 on drying does not make much sense.
I would select the drying button (second one from right under the display). My guess is each time it is pressed the drying level or timed prog will change all you would do then is press start.
This model has two separate drying programs (4th and 5th programs down the blue programs on left of the control knob)
Rotate the control knob to select ‘Cotton Dry’ or ‘Synthetic Dry’ program.
Push the Drying button to change options (dryness level or manual drying time)
Then press start.