Using Extended ASCII 5x7 fonts?

[polygonfuture]

Hi there,

Thank you so much for your library. It's quite robust and so far I love working with the system architecture you created.

One question though, I am wanting to use a 5x7 font that uses extended ASCII characters such as up arrows and down arrows and other non-english symbols that are not included in existing 5x7 fonts.

Do you have a basic explanation of how to do this? It appears u8g2 fonts have extended character ranges uses all unicode symbols and I would love to possibly port these fonts to be used for ArduinoMenu but utilizing the SSD1306ASCII library example.

Thanks so much!