diff --git a/README.md b/README.md
index 7485880..ffcbf1b 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # KFUbeamer: LaTeX template for presentations in KFU corporate design
 
 This repository contains LaTeX sources (based on `beamer`) for
-presentations following roughly the current (April 2021) version
+presentations following roughly the current (March 2022) version
 of the Corporate Design manual of the University of Graz.
 
 This template allows customizing the used fonts through
diff --git a/beamerouterthemekfu.sty b/beamerouterthemekfu.sty
index 91b64ad..6afa3bd 100644
--- a/beamerouterthemekfu.sty
+++ b/beamerouterthemekfu.sty
@@ -22,6 +22,9 @@
     \pgfdeclareimage[height=1cm]{kfu_logo}{kfulogo_en}
 \fi
 
+\def\sponsorlogos{}
+\newcommand{\sponsors}[1]{\def\sponsorlogos{#1}}
+
 %% title slide: left-justified
 \setbeamertemplate{title graphic}{
     \vbox to 0pt {
@@ -59,6 +62,16 @@
     \par%
 }
 \setbeamertemplate{title page}{%
+    \ifx\sponsorlogos\@empty\else%
+        \begin{tikzpicture}[remember picture,overlay]
+            \node[anchor=south east,yshift=3pt,xshift=-6pt] at (current page.south east) {%
+                \foreach \img in \sponsorlogos {%
+                    \hspace{.5ex}%
+                    \includegraphics[height=0.66cm]{\img}%
+                }%
+            };%
+        \end{tikzpicture}%
+    \fi%
     \parbox[b][1cm][c]{0.8925\paperwidth}{\hfill\pgfuseimage{kfu_logo}}
     \vfill
     \begin{minipage}[b][0.7\paperheight]{\textwidth}
diff --git a/beamerthemekfu.sty b/beamerthemekfu.sty
index f44094c..2763ba7 100644
--- a/beamerthemekfu.sty
+++ b/beamerthemekfu.sty
@@ -43,6 +43,8 @@
 \frenchspacing
 \RequirePackage[kerning,spacing]{microtype}
 
+\RequirePackage{tikz}
+
 % define some standard environments
 \newenvironment{bleq}       % block equation
 { \begin{beamercolorbox}{block body}\begin{equation}}%
diff --git a/kfubeamer.tex b/kfubeamer.tex
index 7a2c67e..5351da4 100644
--- a/kfubeamer.tex
+++ b/kfubeamer.tex
@@ -5,31 +5,6 @@
 \usepackage[centercolon]{mathtools}
 \mathtoolsset{showonlyrefs,showmanualtags}
 
-\renewcommand{\phi}{\varphi}
-\newcommand{\eps}{\varepsilon}
-\newcommand{\N}{\mathbb{N}}
-\newcommand{\R}{\mathbb{R}}
-\newcommand{\1}{\mathbb{1}}
-\newcommand{\calF}{\mathcal{F}}
-\newcommand{\calG}{\mathcal{G}}
-\newcommand{\calI}{\mathcal{I}}
-\newcommand{\calJ}{\mathcal{J}}
-\newcommand{\calA}{\mathcal{A}}
-\newcommand{\calC}{\mathcal{C}}
-\newcommand{\calS}{\mathcal{S}}
-\newcommand{\scalprod}[1]{\langle #1 \rangle}
-\newcommand{\norm}[1]{\| #1 \|}
-\newcommand{\set}[2]{\left\{#1:#2\right\}}
-\DeclareMathOperator{\sign}{\mathsf{sign}}
-\DeclareMathOperator{\dom}{\mathsf{dom}}
-\DeclareMathOperator{\ran}{\mathsf{ran}}
-\newcommand{\half}{\frac{1}{2}}
-\renewcommand{\phi}{\varphi}
-\DeclareMathOperator{\Id}{\mathsf{Id}}
-\newcommand{\prox}{\mathsf{prox}}
-\newcommand{\proj}{\mathsf{proj}}
-\newcommand{\supp}{\mathsf{supp}}
-
 %======================================================================
 
 \title{On an interesting equation}
@@ -48,10 +23,13 @@
 }
 
 \date{%
-    \structure{24th Interesting Conference 2021}\\
-    ZOOM, The Cloud, April 1, 2021
+    \structure{25th Interesting Conference 2022}\\
+    ZOOM, The Cloud, April 1, 2022
 }
 
+% optional: list of sponsor logos: comma-separated list of image file names
+% \sponsors{Nawi_Graz_Logo_2015,Nawi_Graz_Logo_2015,Nawi_Graz_Logo_2015}
+
 \begin{document}
 
 %======================================================================