Since HEC-EFM was first publicly released, several suggestions have been offered regarding how particular features might be better labeled and documented to make them more intuitive. While this is a wonderfully simple and constructive idea, creating one ideal set of terms and descriptions is challenging because different teams have different preferences and lexicons. To empower study teams to make HEC-EFM as useful as possible, several features have been added that allow the software to be customized, including output format options, style sheet options, custom style sheets, set output selections, and style sheet editor. In HEC-EFM 5.0 and HEC-EFM Plotter 3.0, the software was further modified to allow users to specify interface labels. For individual users, this enables interface text to be changed to whatever is deemed most communicative. For international users, this enables translation of interface text.