How to define common variables for my testcases under the folder

Under Testcases , I have a list of testcases under a functional folder. All the test cases needs common set of variables. Right now, I am defining the variables for each testcase and copying for the testcase2. Is there a way to define them in one place and use them in all the testcases ?

See GlobalVariables:

You can also find my guide on using variables across test cases in a suite: