Trying to learn Wireshark - Question about the Capture Menu

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I am new to WireShark and I found the following tutorial on the web:

https://web.nmsu.edu/~jbeasley/Cisco_Discovery_4-1/courses/en0500000000/en0509000000/en0509010000/en0509010300/en0509010303/cm2942087662/lab

Under task 1, step 2 says select the interfaces option from the capture menu. My capture menu does not have an interface option. It does have the following options on it:

            Options  
            Start  
            Stop  
            Restart
            Capture Filters
            Refresh Interfaces        F5

The first two are grayed out. The last one is grayed out.

I am hoping that somebody can tell me what I am missing.