This document provides definitions and instructions for completing Mechanistic Air Emissions Simulator (MAES) Study Sheets, one of the key input files required for running MAES. MAES is an updated version of the Methane Emission Estimation Tool (MEET). For details on additional input files, curated emissions data, and activity data, please refer to the main MAES documentation. The content addresses terms found in each tab and includes examples where applicable. Note that this document does not cover equipment operating states; for that information, consult the MAES help documentation at MEET2/README.html, then select ”MEET Model Reference” from the left-side menu.