Font scaling for Type 3 font

Question

I am working with a pdf Document that uses Type3 fonts. The object stream has 

3.6 -16.56 Td /F1 1 Tf

which specifies the font and font size.

I understand that the Type3 fonts are transformed from glyph to text space using FontMatrix.

Does the FontMatrix also impact the font size? If so, how?

Answer 1

Does the FontMatrix also impact the font size? If so, how?

No, it doesn’t. That would be completely wrong. FontMatrix is something fixed for the entire font, whereas font size may be different for every text output.

There is at least one more way of setting font size using text matrix:

/F1 1 Tf
% Font size is 30pt
30 0 0 30 10.455 219.89999 Tm
(F) Tj