Where can I find a description of the font format?

Question

Arduino

I'm using a 0.96" I2C OLED module with arduino. I'm wondering what font format is used and how to create my own font? (for example, I need only numbers and a few special characters, but the size is larger than the default 7x5).
Thank you.
Font description:

0x00 0x7C 0x12 0x11 0x12 0x7C // A
0x00 0x7F 0x49 0x49 0x49 0x36 // B
0x00 0x3E 0x41 0x41 0x41 0x22 // C
0x00 0x41F , 0x41, 0x22, 0x1C, // D
0x00, 0x7F, 0x49, 0x49, 0x49, 0x41, // E

Answer 1

Convert the hexadecimal values ​​to binary (0x36=00110110) and write each such value in a column from top to bottom. Each next value is the next column from left to right.
That's the whole font format.

Answer 2

There are even excel files on the Internet for this. https://yadi.sk/i/CUwWxx9fh82dd