beginframeTitle
beginframeTitle is not a built-in LaTeX or Beamer command. It is not defined by Beamer’s standard syntax. In Beamer, a slide (frame) title is set with \frametitle{Title} inside a frame, or by using \begin{frame}{Title} ... \end{frame}, and sometimes with optional frame options. If you encounter beginframeTitle in source code, it is typically a variable name, a function, or a key within a slide-generation tool or documentation generator, not a TeX primitive. The exact meaning depends on the project; you should search for its declaration or usage pattern, including where it is assigned the title text or where it is used to emit the actual frame environment.
In other contexts outside LaTeX, the string could be used as a label or identifier in a