Use 75 Bold for the main title and 65 Bold for sections.
Once you have the font installed, where should you use it? Here are professional recommendations: font psl kittithada bold 75 65 free
Once you locate a download link, ensure the file name contains exactly: PSL_Kittithada_Bold_75_65.ttf or .otf . Avoid files named FONT_PACK_2024.exe . Use 75 Bold for the main title and 65 Bold for sections