syntax to show hide section, subsection, subsubsections. Syntax: \tableofcontents[sectionstyle=section en cours/autres sections]; \tableofcontents[subsectionstyle=sous-section en cours/autres sous-sections de la section en cours/autres sous-sections]; etc... From: http://mcclinews.free.fr/latex/introbeamer/elements_diaporama.html

tableofcontents_options.tex

\AtBeginSection[]
{
    \begin{frame}[plain]
    \tableofcontents[currentsection, section=show/shaded, subsectionstyle=show/show/hide, subsubsectionstyle=show/show/show/hide]
    \end{frame}
}