Drop down display not showing the value of the output

Please can anyone assist, I want to value the panel drop down to shows on display bucketSizeBytes_Avarage avg

Is there anyone who can assist or suggest how I can go about the above task, I am building a dashboard for my team and I want to give access to those output value but rather than show the value output its showing numberofObject_avarage, bucketSizebyte
I know the issue is due to the template variable, is there a way to display the value?