What is "P" in the font's name?

The letter P attached to the name of a font that you sometimes see。I know that name。Full name is、

proportional

so、

Its initial P

Apparently。Even with the same font name, there are versions with and without P.。I don't care、I was personally concerned。

What is the difference?、I'll leave the difficult parts to others to explain.、It is said that when the alphabet or other European characters appear in a sentence, if you use P, you can write the letters with the same width.。If it is only in Japanese, it will be easier to read without P.。

One question solved。congratulations、My family!