Take things slowly --- you will soon get the hang of it. The coloured tabs are the current prices (bet and lay).

If you go to the left of the screen you will see 'Search Markets' and under it 'All Markets'. Scroll down that heading until you come to 'Horse Racing -- Today's Card', click on it and the races will be indicated as they are due (You have to keep scrolling on that list as time goes along). There you will see if there is a Place Market too. There usually is.

Good Luck.