Due to restrictions of the prjection space, I cannot use the full frame size, thus I want to add a black bar at the bottom of every slide (underneath the footer). Therefore I effectively reduce the hight of each slide.

Is there an easy way to achieve this while still using a standard beamer theme?


You can do it by modifying the footer. Of course this depends on the theme you use, but in the example below in line 24 you can adjust the 2.25ex to how thick you need the black bar.



      \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
        \usebeamerfont{author in head/foot}\insertshortauthor
      \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
        \usebeamerfont{title in head/foot}\insertshorttitle
      \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
        \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
        \insertframenumber{} / \inserttotalframenumber\hspace*{2ex} 


\author{A.U. Thor}
\institute{The Institute}



enter image description here


You don't add a bar, you change aspect ratio to 16:9.



Sets aspect ratio to 16:9, and frame size to 160mm by 90mm.
Sets aspect ratio to 14:9, and frame size to 140mm by 90mm.
Sets aspect ratio to 1.41:1, and frame size to 148.5mm by 105mm.
Sets aspect ratio to 5:4, and frame size to 125mm by 100mm.
The default aspect ratio and frame size. You need not specify this option.
Sets aspect ratio to 3:2, and frame size to 135mm by 90mm
  • But this is like adding a black bar at the top and the bottom ;-)
    – Tobi
    Nov 18 '14 at 18:20
  • @Tobi .......XD
    – Troy Woo
    Nov 18 '14 at 18:24
  • @TroyWoo is right there, I explicitly want to add a bar only on the bottom, as to the top I have lots of space (the beamer is mounted unmovably).
    – Hagadol
    Nov 19 '14 at 8:24

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