Ich möchte den schwarzen Rahmen entfernen, der oben auf jeder Seite erscheint, wie Sie auf dem Bild unten sehen können.
Ich frage mich, ob in meiner Präambel kein Fehler war. Wie könnte ich das beheben? Das ist mein MWE:
\documentclass{beamer}
\usetheme{default}
\usepackage{helvet}
\usepackage{framed,color}
\definecolor{shadecolor}{rgb}{0.74, 0.83, 0.9}
\useoutertheme[subsection=false]{smoothbars}
\usepackage[frenchb]{babel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{helvet}
%%%%%%%%%%%%%%%%%paragraphes justifiés%%%%%
\usepackage{ragged2e}
\apptocmd{\frame}{}{\justifying}{} % Allow optional arguments after frame.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{caption}[numbered]
\usepackage[labelsep=period]{caption}
%%%%%%%%%%%%%%%%%%%%%footline%%%%%%%%%%%%
\addtobeamertemplate{footnote}{}{\vspace{2ex}}
\setbeamertemplate{footline}[text line]{%
\parbox{\linewidth}{\vspace*{-8pt}Title
\hfill\insertshortsubtitle\hfill\strut\insertframenumber/\inserttotalframenumber}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{navigation symbols}{}
%%%%%%%%%%%%%%%%%NUMÉROTATION TOC%%%%%%%%
\setbeamertemplate{section in toc}{\hspace*{1em}\inserttocsectionnumber.~\inserttocsection\par}
\setbeamertemplate{subsection in toc}{\hspace*{2em}\inserttocsectionnumber.\inserttocsubsectionnumber.~\inserttocsubsection\par}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\useinnertheme{circles}
\makeatletter
\patchcmd{\beamer@sectionintoc}{\vskip1.5em}{\vskip0.5em}{}{}
\makeatother
\usepackage{graphicx}
\usepackage{hyperref}
%%%%%%%%%%%%%%%%PLAN%%%%%%%%%%%%%%%%%%%%
\AtBeginSubsection[]
{
\begin{frame}<beamer>
\frametitle{Plan}
\tableofcontents[
currentsection,
sectionstyle=show/show,
subsectionstyle=show/shaded/hide
]
\end{frame}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\title[]{Title}
\subtitle[]{Subtitle}
\author[]{Author}
\institute[]{}
\date[] {}
\begin{document}
\frame{\titlepage}
\begin{frame}{Plan}
\tableofcontents
\end{frame}
\end{document}