When you follow the links (above) to the texts, you will see there are three tabs: Text, Words and Quiz.
On the Text tab, you can click on Latin words to see their meanings. Parsing can be toggled on and off with the 'Analysis' tick box on the bottom right. You can chose whether meanings and parsing appear at the bottom of the page or float above the text with the 'Float' tick box.
On the Words tab, you will see a list of all the words in the text with their type and meaning. If you have clicked on any words on the Text tab though, you will see only those words in this list.
On the Quiz tab, you can test yourself on the meanings of all the words or, if you have clicked some of the words on the Text tab, you will just be tested on those words. You will be able to see your score on the Quiz tab too.