Sstrhsrtj

I am using the Hannover theme in beamer and I am using the title frame as plain

documentclass{beamer}

mode<presentation>

{

  usetheme{Hannover}%{CambridgeUS}%

  setbeamercovered{transparent}

}



title[Title]{Centering Title frame}

author[Gopi]{Gopi}



begin{document}

begin{frame}[plain]

    titlepage

    begin{figure}

    begin{center}

        includegraphics[scale=0.3]{logo}

    end{center}

    end{figure}

end{frame}

end{document}

Because it was not obvious on the first picture (white on white, I have added the same picture without the option "plain" on the frame). My point is that I would like that with the option plain the frame forget about the hannover theme and centers the whole frame.

I tried to put a hspace{-xpt} before the frame but it did not seem to work.

You could hoffset to move the content of the frame to the left, by the half amount of the sidebar width:

begingroup

makeatletter

setlength{hoffset}{-.5beamer@sidebarwidth}

makeatother

begin{frame}[plain]

    titlepage

    ...

end{frame}

endgroup

I used begingroupand endgroup to limit the effect of the change to hoffset to just this frame. makeatletter and makeatletter are necessary for accessing the internal macro beamer@sidebarwidth.

Another solution is to simply define a custom title page:

In the preamble:

defbeamertemplate*{title page}{customized}[1]

{

  usebeamerfont{title}inserttitlepar

  usebeamerfont{subtitle}usebeamercolor[fg]{subtitle}insertsubtitlepar

  bigskip

  usebeamerfont{author}insertauthorpar

  usebeamerfont{institute}insertinstitutepar

  usebeamerfont{date}insertdatepar

  usebeamercolor[fg]{titlegraphic}inserttitlegraphic

}

If the background of the title page isn't white -- for instance, if filled with the fill from tikz, -- then the Stefan's solution won't work as intended: the filled area will be shifted to the left exposing the white background. My solution is to put the title page into a parbox and then shift it by half of the sidebar width:

renewcommandmakebeamertitle{

  {

    begin{frame}[plain]

      makeatletter

      hspace*{-0.5beamer@sidebarwidth}parbox[c]{paperwidth}{

        maketitle

      }

      makeatother

    end{frame}

  }

}