Scroll button missing in CV01N Transaction

Hi Experts,

I have an issue in transaction CV01N. If multiple attachments are attached to a document, the scroll option is available on screen with small button but somehow arrow key button to scroll up & down is not visible and left & right scrolling button is available. My client requires those buttons UP & DOWN,

After referring some code I came to know that, that is ALV GRID display. 

So, can we get? If yes, can you please suggest how to achieve it.