The "Visual Identity GUIDELINE" provides guidelines for the use of the H2IOSC project's visual identity, including logos and branded materials. Developed by Silvia Iachello (CNR ISPC) and Federica Spinelli (CNR OVI), members of the H2IOSC Editorial Board, this guide offers guidance on the use of PNRR project logos, research infrastructure logos, and includes access to a communication kit with ready-to-use graphics and templates for presentations and letterhead.