Chromebook Chrome browser scroll

On Chromebook, Chrome browser (Acer Chromebook) when viewing settings page, Down Arrow, Ctl+down, Mouse scroll down, et al, do not scroll down. I have to reduce zoom to see more of page and then it is too small to read. Any suggestions greatly appreciated.

I was playing around with it this morning in a regular Chrome browser. In normal mode, arrow keys don’t do anything, but the mouse scroll should work.

There is a mode called “leanback mode” in the settings, which is mainly for TVs with a keyboard attached. In that mode, the arrow keys do work, but my mouse did not. (If you get in that mode and want to get out, just mouse left till you get the menus to appear, and then mouse down to settings).