u8x8_font_m2icon_7_f: Contains arrows, battery indicators, and settings gears.

font_7x10_profont_n: Technically fits the 8x8 grid but uses internal spacing for better clarity.

Memory ConstraintsIf you are using an ATtiny chip, stick to the 'r' (restricted) fonts. These include only basic ASCII characters, saving significant Flash memory compared to the 'f' (full) versions which include accented characters and extended symbols.

Readability vs. Information DensitySmall fonts allow you to cram more data onto the screen (up to 16 lines of text on a 128x64 display). However, if the device is meant to be read from a distance, such as a desktop clock, you should use the "2x2" scaling function to turn an 8x8 font into a 16x16 display.

Symbols and IconsOne of the most powerful features of U8x8 is the ability to display icons as if they were text characters.

Direct Rendering: Because characters align with the internal hardware structure of most OLEDs (like the SSD1306), the library can push data to the screen instantly.

When selecting a font for your project, consider these three factors: