diff --git a/ngslides.ipe b/ngslides.ipe
index 39cb45f..b344bc6 100644
--- a/ngslides.ipe
+++ b/ngslides.ipe
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE ipe SYSTEM "ipe.dtd">
 <ipe version="70218" creator="Ipe 7.2.30">
-<info created="D:20251223164924" modified="D:20260107181057" title="Einführung in Graphen" author="Never, Ever" subject="Seminar Algorithmik" keywords="graph, algorithm" language="Deutsch" numberpages="yes" tex="luatex"/>
+<info created="D:20251223164924" modified="D:20260122165753" title="Einführung in Graphen" author="Never, Ever" subject="Seminar Algorithmik" keywords="graph, algorithm" language="Deutsch" numberpages="yes" tex="luatex"/>
 <ipestyle name="basic">
 <symbol name="arrow/arc(spx)">
 <path stroke="sym-stroke" fill="sym-stroke" pen="sym-pen">
@@ -311,6 +311,71 @@ h
 <tiling name="rising" angle="30" step="4" width="1"/>
 </ipestyle>
 <ipestyle name="ngslides">
+<symbol name="arrow/ng-fnormal(spx)">
+<path stroke="sym-stroke" fill="white" pen="sym-pen">
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+h
+</path>
+</symbol>
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+</symbol>
+<symbol name="arrow/ng-fdouble(spx)">
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 <color name="NG dark blue" value="0.121 0.47 0.705"/>
 <color name="NG dark brown" value="0.651 0.337 0.157"/>
 <color name="NG dark cyan" value="0.106 0.62 0.467"/>
@@ -364,11 +429,6 @@ h
 
 \setlist{leftmargin=*}
 
-\makeatletter
-\newcommand{\ngtitle}{\@title}
-\newcommand{\ngauthor}{\@author}
-\makeatother
-
 \newcommand{\bk}{\color{black}}
 \newcommand{\wt}{\color{white}}
 \newcommand{\bu}{\color{NG dark blue}}
diff --git a/ngslides.isy b/ngslides.isy
index af99561..bbcc529 100644
--- a/ngslides.isy
+++ b/ngslides.isy
@@ -22,6 +22,72 @@
 \newcommand{\tl}{\color{title}}
 </preamble>
 
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 <color name="NG dark blue" value="0.121 0.47 0.705"/>
 <color name="NG dark brown" value="0.651 0.337 0.157"/>
 <color name="NG dark cyan" value="0.106 0.62 0.467"/>