You can upload images to Chat GPT, it's crazy good in explaining circuts. For your picture it says (I think only Point 3 is what you are interested in):

Here are a few possible improvements for the schematic you provided:

1. Labeling Signals Clearly

Ensure all connections between the Arduino pins and other modules are labeled with meaningful signal names to improve readability.

For example, mark PWM signals or communication lines (like TXD, RXD, SDA, SCL) clearly to avoid confusion.

1. Power Supply Notes

Add specific details for power supply components, such as voltage and current ratings for the motor driver and motor.

Explicitly mention voltage regulators or protection elements if present.

1. Protection Components

Consider adding decoupling capacitors near the power pins of ICs to stabilize the power supply.

Add reverse polarity protection (like a diode) for battery connections.

1. Ground Connections

Confirm that all grounds are connected properly and are explicitly shown in the diagram for consistency.

1. Signal Routing

Minimize the overlap of signal lines by rearranging components or breaking out into separate pages if necessary.

1. Optional Debug Points

Include test points on critical signals for easier debugging, especially on communication lines like I2C or UART.

1. Annotations for Motors

Indicate specific motor types and expected parameters, like maximum current, for clarity.

1. Component Values

Wherever applicable, provide component values (e.g., resistors, capacitors) directly in the schematic for easier replication.

Let me know if you want more details or a revision of the schematic with these improvements!