diff --git a/Doc/Sd1/Ref/Fig/pre.tex b/Doc/Sd1/Ref/Fig/pre.tex
index 12db7b3e19c52f991daa7162c197d7c8ebf4d43f..f7f2bf488f3ecec54d32ccd74884a72883c60959 100644
--- a/Doc/Sd1/Ref/Fig/pre.tex
+++ b/Doc/Sd1/Ref/Fig/pre.tex
@@ -13,7 +13,7 @@
 \setbeamercolor{structure}{fg=black,bg=white}
 \setbeamercolor{normal text}{fg=black,bg=white}
 \setbeamercolor*{example text}{fg=green, bg=magenta}
-\setbeamercolor{alerted text}{red}
+\setbeamercolor{alerted text}{fg=red}
 
 \setbeamercolor*{palette primary}{fg=white,bg=hdmred!85!white}
 \setbeamercolor*{palette secondary}{fg=white,bg=hdmred}
diff --git a/Doc/Sda1/Ref/Fig/pre.tex b/Doc/Sda1/Ref/Fig/pre.tex
index 12db7b3e19c52f991daa7162c197d7c8ebf4d43f..f7f2bf488f3ecec54d32ccd74884a72883c60959 100644
--- a/Doc/Sda1/Ref/Fig/pre.tex
+++ b/Doc/Sda1/Ref/Fig/pre.tex
@@ -13,7 +13,7 @@
 \setbeamercolor{structure}{fg=black,bg=white}
 \setbeamercolor{normal text}{fg=black,bg=white}
 \setbeamercolor*{example text}{fg=green, bg=magenta}
-\setbeamercolor{alerted text}{red}
+\setbeamercolor{alerted text}{fg=red}
 
 \setbeamercolor*{palette primary}{fg=white,bg=hdmred!85!white}
 \setbeamercolor*{palette secondary}{fg=white,bg=hdmred}
diff --git a/Doc/Sda2/Ref/Fig/pre.tex b/Doc/Sda2/Ref/Fig/pre.tex
index 12db7b3e19c52f991daa7162c197d7c8ebf4d43f..f7f2bf488f3ecec54d32ccd74884a72883c60959 100644
--- a/Doc/Sda2/Ref/Fig/pre.tex
+++ b/Doc/Sda2/Ref/Fig/pre.tex
@@ -13,7 +13,7 @@
 \setbeamercolor{structure}{fg=black,bg=white}
 \setbeamercolor{normal text}{fg=black,bg=white}
 \setbeamercolor*{example text}{fg=green, bg=magenta}
-\setbeamercolor{alerted text}{red}
+\setbeamercolor{alerted text}{fg=red}
 
 \setbeamercolor*{palette primary}{fg=white,bg=hdmred!85!white}
 \setbeamercolor*{palette secondary}{fg=white,bg=hdmred}
diff --git a/Doc/Sdi/Ref/Fig/pre.tex b/Doc/Sdi/Ref/Fig/pre.tex
index 12db7b3e19c52f991daa7162c197d7c8ebf4d43f..f7f2bf488f3ecec54d32ccd74884a72883c60959 100644
--- a/Doc/Sdi/Ref/Fig/pre.tex
+++ b/Doc/Sdi/Ref/Fig/pre.tex
@@ -13,7 +13,7 @@
 \setbeamercolor{structure}{fg=black,bg=white}
 \setbeamercolor{normal text}{fg=black,bg=white}
 \setbeamercolor*{example text}{fg=green, bg=magenta}
-\setbeamercolor{alerted text}{red}
+\setbeamercolor{alerted text}{fg=red}
 
 \setbeamercolor*{palette primary}{fg=white,bg=hdmred!85!white}
 \setbeamercolor*{palette secondary}{fg=white,bg=hdmred}