How to change the size of the HUD in external view

Hi everyone,
I installed the Flight Simulator for my father who has problems to read (small) text on a screen. So when playing in the external view he cannot read the HUD/ the information regarding airspeed, altitude and so on, despite playing on a really large screen.
So for I wasn’t able to figure how to increase the size of it.
Can someone tell me if it is possible to increase the size and if it is, how to do it.
Thanks a lot in advance.

Have you found out how? I have the same issue.

Unfortunately not. And you are the first to reply.

I have the same problem Hopefully they’ll fix this soon

Try my mod. I have changed size to 60%, but you can set it smaller.