Hovering mouse over a variable no longer shows present value in R2015a (student) upgrade?

I loved the ability to hover my mouse over a vaiable created in a script to show the present value in R2014a (student). Now, since updating to R2015a (student), the hover no longer works. At the moment, BOTH R2014a and R2015a are installed on the same PC. In R2014a, the hover still works. Is there any setting I could have missed?

Answer 1

[Sean de Wolski]

Checkbox in preferences:

[Richard]

THANK YOU SO MUCH!! YOU SOLVED MY PROBLEM!!

[Jeff]

Same here!

[Adib Yusof]

Thank you!!

Answer 2

[K Krabbenhoft]

My problem is that I want to disable it. Unticking the box doesnt do that...