Excel can be tricky. If you type a letter and apply Symbol MT, the cell will display the corresponding symbol. However, Excel's formula bar may still show the original Latin letter. This is normal. For example:
Problem: You open Photoshop or Illustrator, and you see "Symbol" but not "Symbol Mt." Cause: Adobe applications sometimes index the font family name differently. Solution: Select "Symbol" in the font menu. On 99% of modern systems, selecting "Symbol" loads the Symbol Mt font file. Try typing the letter "m" – if you see a "μ" (Mu), you are using the correct font. Symbol Mt Font
Adobe applications recognize Symbol MT if it is installed on your system. However, modern Adobe software prefers Unicode symbols. To use Symbol MT: Excel can be tricky
In statistics, specific symbols are mandatory. The mean is represented by "x̅" (which requires combining characters) but variance is often "σ²". Using Symbol Mt, you can type s for sigma and then superscript the 2 using standard formatting. It is much faster than Unicode searching. This is normal