dimensions when doing text-scale-increase, and including minibuffer in text-scale-increase

[Samuel Wales]

question 1:

if i want to know the usable default dimensions in human lines and
columns terms, i can do:

(let ((r (list (frame-width)
                 (frame-height))))
    (message "%s =frame width and height =(should be (110 32) at
/native resolution 1440/ with /dpi of 216/)"
             r)

but if i do text-scale-increase the result is the same.  i want to
know the same data about what is /there now/.


question 2 (only silghtly related):

i want to do text-scale increase on exactly the active buffer and
"its" minibuffer, but not any other buffers.  i'd prefer modeline not
increase, however.

whenever i switch back to the increased buffer, i want it and "its"
echo area / minibuffer to still be increased.


thank you.