For Arial, the classification usually maps to a "Normal Sans Serif" value (specifically Value 11 in some Microsoft specifications).
You must clear your font cache. On Windows, run cmd as administrator and type fcache -clear . Restart your computer. Arial Normal Panose Default Font Download Extra Quality
: For professional use on websites or in applications where it is not pre-installed, you can license it through Adobe Fonts Free Alternatives For Arial, the classification usually maps to a