If you need to type numbers really fast, of course there’s no beating numlock. 10 key for the win. Of course that doesn’t get at why not just leave it as 10 key forever and skip the arrows. I know a lot of older programs… like msdos older…required the use of the arrow keys. And some people do prefer it for their cursor, and it doesn’t hurt to provide the option.
The thumbnail made me see the man first, and it was interesting how the dog emerged in my vision— first as a man wearing a jacket with a dogface on the back, and then suddenly the entire man transforming into a dog facing the other way like an animorph.
If I’d seen the enlarged image first, or if I’d seen it on a monitor instead of a phone screen, probably would have seen the dog first and struggled to see the man.