Thank you. Sorry for the time, but I had to first understand what you meant, and search with «help Adobe», the meaning. I thought it was scroll5. And then I realised the V was for vertical. So I said to myself, I might as well make 2 buttons instead of one. Up and down.
And I am afraid you are becoming like Ned Murphy. Just, barely the minimum info. No fun anymore. Here the code for those who want it: