Arduino+pro+micro+eagle+library -

Arduino Pro Micro (based on the ATmega32U4) is a popular choice for compact PCB designs. Because it is a SparkFun-designed board, the most "canonical" Eagle library is the official SparkFun Eagle Libraries

RAW (Input: 5-12V via onboard regulator)
VCC (Output: 5V or 3.3V regulated)
RST (Reset) This prevents beginners from accidentally frying their PC by feeding 5V into RAW (don’t worry, the library doesn’t make that mistake; the user does).

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When searching for the part in the "Add" dialog, look for the following specifications: eagle librar for arduino micro - General Electronics arduino+pro+micro+eagle+library

Measure the hole diameter: Should be ~1.0mm (square pin headers) or ~0.8mm (round pin headers). The library must match.
Measure the pitch: Center-to-center distance between pins should be 2.54mm (0.1 inches).
Check the spacing between rows: The Pro Micro rows are often 0.6 inches apart (15.24mm). This is standard, but some clones use 0.7 inches.

If you want to create a custom library part specifically for your layout needs, follow these steps in Eagle: Create a New Library File > New > Library and save it (e.g., MyParts.lbr Draw the Symbol Library > Symbol and name it tool to draw a rectangle for the board outline. Arduino Pro Micro (based on the ATmega32U4) is

Step-by-Step Installation Guide

Assuming you have Autodesk Eagle (Version 9.x or Fusion 360/Eagle), here is how to install your new library. RAW (Input: 5-12V via onboard regulator) VCC (Output:

Connect your external components (LEDs, sensors, MOSFETs) to these nets. Remember that pins 2 and 3 are hardware interrupts; pins 9, 10, and 16 are PWM.

SparkFun Eagle Libraries: This is the most widely used community resource. The Pro Micro footprint is located within the SparkFun-Boards.lbr file.