A second monitor is a good option for you'r problem (and better than a cheap tab), but 12" monitor is just not available afaik. You can easily get a 15" monitor for 4k which more than you need for you'r father to type letters or for any other purpose.
A second monitor is a good option for you'r problem (and better than a cheap tab), but 12" monitor is just not available afaik. You can easily get a 15" monitor for 4k which more than you need for you'r father to type letters or for any other purpose.