diff --git a/ptbposter/ptbposter-2020.clo b/ptbposter/ptbposter-2020.clo
index 0b1f9bfff5545d6423ff7ac2ddd7b72fdbf9e562..05f0f0587129fbf70f308b77a0fbcaec343f8485 100644
--- a/ptbposter/ptbposter-2020.clo
+++ b/ptbposter/ptbposter-2020.clo
@@ -12,6 +12,7 @@
 
 \ifPTB@XeOrLua
   \setfontfamily\PTBdesignFont{UniversNextPro-Light}[%
+    Ligatures=TeX,
     BoldFont=*,
     ItalicFont=*Italic,
     Scale=1.01,
@@ -31,7 +32,7 @@
   \setlength\PTB@topmargin{0.193953\PTB@scale@base}%
   \ifPTBlandscape  % ???
     \setlength\PTB@framewidth{0.950378471315\PTB@scale@base}%  3215pt (1130mm) bei A0 
-    \setlength\PTB@frameheight{0.462\PTB@scale@base}% 1563pt  (549mm) bei A0 
+    \setlength\PTB@frameheight{0.447\PTB@scale@base}% 1563pt  (549mm) bei A0 
   \else
     \setlength\PTB@framewidth{0.656013458076\PTB@scale@base}%  2219pt  (780mm) bei A0
     \setlength\PTB@frameheight{0.740117747573\PTB@scale@base}% 2504pt  (880mm) bei A0
@@ -81,8 +82,6 @@
       \PTB@tempa% Title
     \end{hyphenrules}
   }%
-  \PTB@tempdima=-0.172\PTB@scale@base
-  %\linethickness{\PTB@framethickness}\color{PTBcolor}%\color{PTBcolor}%
   % blauer Rahmen
   \put(\PTB@leftmargin,\dimexpr-\textheight-2\PTB@textvsep-\PTB@topmargin){%
     \linethickness{\PTB@framethickness}\color{PTBcolor}%
@@ -92,56 +91,47 @@
 
 \AddToShipoutPictureFG*{% Fuß (relativ zur unteren Kante des Textbereichs)
   \AtTextLowerLeft{%
-    \put(-\PTB@texthsep,-\PTB@textvsep){%
-      \PTB@tempdimb=0.000420521447484\PTB@scale@base
-      \linethickness{\PTB@tempdimb}\normalcolor
-      \PTB@tempdima=-0.0420521447484\PTB@scale@base
-      \put(-.5\@wholewidth,\PTB@tempdima){%
-        \PTB@tempdima=0.0386879731686\PTB@scale@base
-        \PTB@tempdimb=0.00168208578994\PTB@scale@base
-        \ifx\PTB@qrcode\@empty
-          \color{PTBcolor}\framebox(\PTB@tempdima,\PTB@tempdima){}%
-        \else
-          \sbox\@tempboxa{\qrcode[height=\PTB@tempdima,tight]{\PTB@qrcode}}%
-          \raisebox{\dp\@tempboxa}{\usebox\@tempboxa}%
-        \fi
-        \color{PTBcolor}
-        \hspace{\PTB@tempdimb}\raisebox{-\@wholewidth}{%
-          \rule{\dimexpr\PTB@tempdima+2\@wholewidth}%
-            {\dimexpr\PTB@tempdima+2\@wholewidth}}%
-        \hspace{\PTB@tempdimb}\framebox(\PTB@tempdima,\PTB@tempdima){}%
-      }
-      \PTB@tempdimb=-0.00841042894969\PTB@scale@base
-      \footFontSize\sffamily\normalcolor
-      \PTB@tempdima=0.122792262665\PTB@scale@base
+    \PTBdesignFont\footFontSize\normalcolor
+    \PTB@tempdima=-\PTB@framethickness 
+    \PTB@tempdimb=-0.0125\PTB@scale@base
+    \put(-\PTB@texthsep,-\PTB@textvsep){
       \put(\PTB@tempdima,\PTB@tempdimb){%
         \begin{tabular}[t]{@{}l@{}}
           Physikalisch-Technische Bundesanstalt \\
-          Braunschweig und Berlin \\[\f@baselineskip]
-          \ifx\first@author\@empty\else \textbf{\first@author}\\\fi
-          \ifx\PTB@department\@empty\else \PTB@department\\\fi
-          \ifx\PTB@workingGroup\@empty\else \PTB@workingGroup\\\fi
+          Nationales Metrologieinstitut \\[\f@baselineskip]
+          \ifx\PTB@street\@empty\else\PTB@street\\\fi
+          \ifx\PTB@location\@empty\else\PTB@location\\\fi
+          \href{https://www.ptb.de/}{www.ptb.de}
         \end{tabular}%
       }
-      \PTB@tempdima=0.263246426125\PTB@scale@base
+      \PTB@tempdima=0.115\PTB@scale@base
       \put(\PTB@tempdima,\PTB@tempdimb){%
         \begin{tabular}[t]{@{}ll@{}}
-          \ifx\PTB@street\@empty\else\multicolumn{2}{@{}l@{}}{\PTB@street}\\\fi
-          \ifx\PTB@location\@empty\else\multicolumn{2}{@{}l@{}}{\PTB@location}\\\fi
+          \ifx\first@author\@empty\else \multicolumn{2}{@{}l@{}}{\first@author}\\\fi 
+          \ifx\PTB@workingGroup\@empty\else \multicolumn{2}{@{}l@{}}{\PTB@workingGroup}\\\fi
+          \\
           \ifx\PTB@phone\@empty\else\ifPTB@german@ Telefon\else Phone\fi:
             &\PTB@phone\\\fi
           \ifx\PTB@fax\@empty\else Fax:&\PTB@fax\\\fi
           \ifx\PTB@email\@empty\else\ifPTB@german@ E-Mail\else E-mail\fi:
             &\href{mailto:\PTB@email}{\PTB@email}\\\fi
-          \multicolumn{2}{@{}l@{}}{\href{http://www.ptb.de/}{www.ptb.de}}
         \end{tabular}%
       }
-      \PTB@tempdima=0.378469302736\PTB@scale@base
+      \PTB@tempdima=0.219\PTB@scale@base
       \put(\PTB@tempdima,\PTB@tempdimb){%
         \begin{tabular}[t]{@{}l@{}}
           \@thanks % wurde bei der Ausführung von \@author gefüllt.
         \end{tabular}%
       }
+      \ifx\PTB@logo\@empty\else
+        \PTB@tempdimc=0.038875630234\PTB@scale@base% 131bp bei A0
+        \PTB@tempdima=\dimexpr\PTB@framewidth-\PTB@tempdimc+\PTB@framethickness
+        \sbox\PTB@tempboxa{\includegraphics[width=\PTB@tempdimc]{\PTB@logo}}% 
+        \put(\PTB@tempdima,\PTB@tempdimb+\ht\strutbox){%
+          \raisebox{-\ht\PTB@tempboxa}[0pt]%
+            [\dimexpr\ht\PTB@tempboxa+\dp\PTB@tempboxa]{\usebox\PTB@tempboxa}%
+        }
+      \fi
     }
   }
 }
diff --git a/ptbposter/ptbposter-doc-1.pdf b/ptbposter/ptbposter-doc-1.pdf
index 6cd1864481cde1b473ce504709888f758874837f..d536bd9d3446b1fc63ae7f948f88209bed8d8356 100644
Binary files a/ptbposter/ptbposter-doc-1.pdf and b/ptbposter/ptbposter-doc-1.pdf differ
diff --git a/ptbposter/ptbposter-doc-1.tex b/ptbposter/ptbposter-doc-1.tex
index cc93025cacd677d23aa56045ef872f78e4c48306..cfba7d1596d45e04d4f4ac2dabb8ac3da604cf54 100644
--- a/ptbposter/ptbposter-doc-1.tex
+++ b/ptbposter/ptbposter-doc-1.tex
@@ -1,12 +1,13 @@
 
 \documentclass[
+%landscape,
 %,english
 %,a4paper
 ,layout2020
 ]{ptbposter}
 
 \phone{+49-30-3481-7316}
-\fax{+49-30-3481-7503}
+\fax{+49-30-3481-7490}
 \email{Rolf.Niepraschk@ptb.de}
 \workingGroup{7.54 Vakuummetrologie}
 \department{7.5 Wärme und Vakuum}
@@ -57,7 +58,8 @@ zu entnehmen.
   \item \textbf{centerTitle}: Den Titel zentriert setzen.
   \item \textbf{raggedTitle}: Den Titel mit "`Flatterrand"' setzen.
   \item \textbf{centerAuthors}: Die Autoren zentriert setzen.
-  \item \textbf{shortPTBlogo}: verkürztes PTB-Logo  (Text entfällt)
+  \item \textbf{shortPTBlogo}: verkürztes PTB-Logo  (Text entfällt; nur im 
+  Falle von "`layout2018"' wirksam)
   \item \textbf{layout2018, layout2020}: Layoutvarianten
 \end{itemize}
 
diff --git a/ptbposter/ptbposter-doc-2.pdf b/ptbposter/ptbposter-doc-2.pdf
index ba33ee4183132694ab48af8ad040f8589b16f631..e181e31cc0c9e080b4ecc2cab4a519d3230ec154 100644
Binary files a/ptbposter/ptbposter-doc-2.pdf and b/ptbposter/ptbposter-doc-2.pdf differ
diff --git a/ptbposter/ptbposter-doc-2.tex b/ptbposter/ptbposter-doc-2.tex
index d8da2f1024d11a127203028799fee3952a364036..6ec2da163495a173463276212d228dbd2bd6fb51 100644
--- a/ptbposter/ptbposter-doc-2.tex
+++ b/ptbposter/ptbposter-doc-2.tex
@@ -4,10 +4,11 @@
 %,english
 %,a4paper
 ,layout2018
+%,layout2020
 ]{ptbposter}
 
 \phone{+49-30-3481-7316}
-\fax{+49-30-3481-7503}
+\fax{+49-30-3481-7490}
 \email{Rolf.Niepraschk@ptb.de}
 \workingGroup{7.54 Vakuummetrologie}
 \department{7.5 Wärme und Vakuum}
@@ -24,7 +25,7 @@
 
 %%\scaleFontSizes{1.05}%     Werte nahe an "1" wählen!
 
-\title{Die \LaTeX"=Dokumentenklasse "`ptbposter"'}
+\title{Die \LaTeX-Dokumentenklasse "`ptbposter"'}
 
 \begin{document}
 
diff --git a/ptbposter/ptbposter.cls b/ptbposter/ptbposter.cls
index 75c3339dec0b00aaebc43a0dac23bd5500d6c5b5..050ecdf7d100509547ee48ae343444b39367828f 100644
--- a/ptbposter/ptbposter.cls
+++ b/ptbposter/ptbposter.cls
@@ -36,13 +36,16 @@
 \newcommand\PTB@tempe{}
 \newcommand\PTB@tempf{}
 
-\let\PTB@tempdima=\@ovxx
-\let\PTB@tempdimb=\@ovyy
-\let\PTB@tempdimc=\@ovdx
+\newdimen\PTB@tempdima
+\newdimen\PTB@tempdimb
+\newdimen\PTB@tempdimc
+\newdimen\PTB@tempdimd
 
 \newcounter{PTB@tempcnta}
 \newcounter{PTB@tempcntb}
 
+\newbox\PTB@tempboxa
+
 \newif\ifPTBlandscape \PTBlandscapefalse
 \newif\ifPTB@XeOrLua \PTB@XeOrLuafalse
 \newif\ifSERIF \SERIFfalse