diff --git a/docs/user_guide_en_source/cap_manip.tex b/docs/user_guide_en_source/cap_manip.tex
index 62d062e..15743b9 100644
--- a/docs/user_guide_en_source/cap_manip.tex
+++ b/docs/user_guide_en_source/cap_manip.tex
@@ -245,7 +245,7 @@ To increase the brightness, hold down the \textbf{left} mouse button and \textbf
 
 To disable the feature, click again on the shortcut icon (figure \ref{fig:window_level_shortcut}).
 
-You can use preset brightness and contrast patterns. The table \ref{tab:window_level} lists some tissues types with their respective brightness and contrast values ​​for the image. To use the presets patterns, position the mouse cursor over the image and \textbf{right-click} to open a context menu on it. When the menu opens, select \textbf{Window width and level}, and then click on the preset option, according to the tissue type, as shown in the figure \ref{fig:window_level}.
+You can use preset brightness and contrast patterns. The table \ref{tab:window_level} lists some tissues types with their respective brightness and contrast values for the image. To use the presets patterns, position the mouse cursor over the image and \textbf{right-click} to open a context menu on it. When the menu opens, select \textbf{Window width and level}, and then click on the preset option, according to the tissue type, as shown in the figure \ref{fig:window_level}.
 
 \begin{figure}[!htb]
 \centering
--
libgit2 0.21.2