 This is a video that will show you some of those things you can do if you could add extra media to labs So as you can see we're in the JHS environment and we'll open up one of the standard labs and There you see in green what I call the lecture part of it followed by the blue or the operation Sentences that have been put in by the lab designer the black or the results and then of course where the flashing cursor is You can add your own information to your own interaction So create a new lab in honor of the the J conference in 2014 in Toronto in July Good idea to go if or book into it if you haven't yet and Here we see two interactive windows running next to each other So on the left is the standard JHS with the information That I want to play around with and on the right is my shape and type window where I can Display some of the same information Except that it shows up a little bit differently So on the left you see the standard CCCC the four by the two by two Array what that looks like and then on the right you've got the green squares indicating characters Where this becomes important, and we'll see it right now when you go to a shape of one by one In the standard environment, there's no difference between a shape of one by one or a shape of one in the way it looks But you'll see it switch here and There you go. You can see that now. This is only a shape of one not a shape of one by one So the the rank actually displays that way you similarly with zero Values in the dimension you can see clearly where those zeros are and how they affect the shape And of course you can assign a type So for instance right now it's going to be a complex type Which in the standard environment Displays as you you might expect now that the variable is carried right over to the other one to the new environment And that's kind of useful and I can change this now to a extended variable number and when I Take a look at a now. I've reassigned it and it's in red showing. It's an extended and Similarly if I make it an integer now that I take that X off and now the display would be Going back to black as an integer So two environments both running at the same time and interactive Adding fractions and J is easy you can also Have the JHS on the left and on the right be running a video in this case a video from YouTube I had promoting rational arithmetic Pretty neat kind of a thing to be able to running a video to clarify a concept at the same time You're doing something on the left and you can interact there And of course this has got the standard JHS interaction You can use the usual Ripple and then wrapping it up you go back to a full screen which allows you to Be running J in the JHS and I'm just the way you'd expect we can go back to again to the standard lab And we're back to the lecture followed by the operational statements and results