From your screenshot, I see that text size is normal from topic title to text you are typing. Do I miss something with your text sizes?
Yeah, text size in my reply field is same like in topic title, but it used to be bigger and I haven't changed anything in settings.
Thanks for your suggestions and inputs, guys. I looked at accesibility settings and I see that text size is at 100%, so, it's not related with my browser settings.Now I tried to check how it looks on Firefox and it's same little text..
So, I guess that I will have to zoom in a bit more. Reset settings is an option, but don't really want to do that, as all my logins and preferences will be gone.