diff --git a/commun/commun.sty b/commun/commun.sty
index 1505c8d..7a73670 100644
--- a/commun/commun.sty
+++ b/commun/commun.sty
@@ -43,14 +43,15 @@
 	\RequirePackage{luatextra}	      % charge fontspec => fontenc
 	% \defaultfontfeatures{Ligatures=TeX}
 \else
-	\RequirePackage[french]{babel}	% => polyglossia
+	\RequirePackage[french]{babel}	  % => polyglossia
 	\RequirePackage[utf8]{inputenc}		% => fontspec
 	\RequirePackage[T1]{fontenc}		  % => fontspec
   % \RequirePackage[babel=true,kerning=true]{microtype}
 \fi
 
 % fonts
-\RequirePackage{libertine}
+\RequirePackage{inconsolata}
+% \RequirePackage{libertine}
 \RequirePackage{pifont}
 \RequirePackage{fontawesome}
 \RequirePackage[right]{eurosym}
@@ -72,9 +73,8 @@
 
 % maths
 \RequirePackage{amsmath, amsthm, amsfonts, amssymb}
-% \RequirePackage{amsmath, amsthm, amssymb}
 \RequirePackage{tkz-euclide}
-\usetikzlibrary{arrows, calc, positioning, shapes.geometric, shadows, snakes, tikzmark}
+\usetikzlibrary{arrows, calc, patterns, positioning, shapes.geometric, shadows, snakes, tikzmark}
 \RequirePackage{calc}
 \RequirePackage{fourier}
 \RequirePackage{pgfplots}
@@ -83,6 +83,9 @@
 \RequirePackage{asymptote}
 \RequirePackage{mathrsfs}
 \RequirePackage{xlop}
+% \RequirePackage{pst-plot,pst-tree,pstricks,pst-node}
+% \RequirePackage{pst-eucl}
+% \RequirePackage{pstricks-add}
 
 % tableaux de signe
 %\RequirePackage{tabvar}    % replaced by pdftabvar from pdfadd
@@ -99,7 +102,6 @@
 \RequirePackage{array}
 \RequirePackage{tabularx}
 \RequirePackage{makecell}
-\RequirePackage{multicol}
 \RequirePackage{multirow}
 \RequirePackage{boldline}
 \RequirePackage{colortbl}
@@ -116,13 +118,13 @@
 \RequirePackage{comment}
 \RequirePackage{caption}
 \RequirePackage[outputdir=./build]{minted}
-\RequirePackage{inconsolata}
 \RequirePackage{tasks}
 \RequirePackage{dashrule}
 \RequirePackage{qrcode}
 \RequirePackage{verse}
 \RequirePackage{nicefrac}
 \RequirePackage{blindtext}
+\RequirePackage{wasysym}
 %--
 
 
@@ -168,9 +170,9 @@
 %
 %
 
-% 
+%
 % Tikz
-% 
+%
 \tikzstyle{arrow} = [thick,->,>=stealth]
 
 % Tableau
@@ -295,6 +297,10 @@
     \kern\dimexpr-\fboxsep-\fboxrule\relax
   }\par\kern#2
 }
+
+\NewDocumentCommand \colsep{ G{1} }{
+    \setlength{\columnseprule}{#1}
+}
 %--
 
 
@@ -429,7 +435,7 @@
 \else
   \newcommand\newFontCommand[2]{%
     \expandafter\newcommand\csname #1\endcsname{\usefont{T1}{#2}{m}{n}}}
-  
+
   \newFontCommand{Jd}{j.d.}
 \fi
 
@@ -471,6 +477,7 @@
 % Create some color commands
 \newColorCommand{red}
 \newColorCommand{black}
+\newColorCommand{blue}
 \newColorCommand{gray}
 \newColorCommand{green}
 \newColorCommand{lapislazuli}
diff --git a/jl-cours/jl-cours.cls b/jl-cours/jl-cours.cls
index 4f57ead..94e1ce7 100644
--- a/jl-cours/jl-cours.cls
+++ b/jl-cours/jl-cours.cls
@@ -74,7 +74,7 @@
 %
 %
 
-\DeclareOptionX{type}[crs]{%
+\DeclareOptionX{type}[c]{%
   \def\type{#1}%
 }
 
@@ -141,13 +141,15 @@
 %		\rohead[Exercices]{Exercices}
     \IfNoValueTF{ \subtitle }{
       % \cohead[]{\@title}
+      \rehead*[]{Exercices}
       \rohead*[]{Exercices}
     }{
       % \cohead[]{\@title}
+      \rehead*[]{Exercices - \@subtitle}
       \rohead*[]{Exercices - \@subtitle}
     }
 	}{
-    \ifthenelse{ \equal{\type}{q} }{
+    \ifthenelse{ \equal{\type}{r} }{
 %      \cohead[\@title]{\@title}
 %      \rohead[Rappels]{Rappels - \@subtitle}
       % \cohead*[]{\@title}
@@ -171,8 +173,7 @@
 % \clearpairofpagestyles
 
 % set my own numbering form for the footer
-\cofoot[\thepage\ /\ \pageref{LastPage}]{\thepage\ /\ \pageref{LastPage}}
-\cefoot[\thepage\ /\ \pageref{LastPage}]{\thepage\ /\ \pageref{LastPage}}
+\cfoot*{\thepage\ /\ \pageref{LastPage}}
 
 \pagestyle{scrheadings}
 \setkomafont{pagehead}{\normalfont\bfseries}
@@ -357,8 +358,7 @@
 %% deactivate page numbering in footer
 %%
 \NewDocumentCommand \nonumbering{ }{
-  \cefoot*{}
-  \cofoot*{}
+  \cfoot*{}
 }
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
diff --git a/jl-devoir/jl-devoir.cls b/jl-devoir/jl-devoir.cls
index 48028f1..78abd53 100644
--- a/jl-devoir/jl-devoir.cls
+++ b/jl-devoir/jl-devoir.cls
@@ -69,7 +69,7 @@
 %
 %
 
-\DeclareOptionX{type}[ds]{%
+\DeclareOptionX{type}[e]{%
   \def\type{#1}%
 }
 
@@ -146,7 +146,7 @@
 }{
 	\ifthenelse{ \equal{\type}{d} }{
    	\cohead[\textbf{MATHÉMATIQUES}\\\textbf{Devoir maison}]
-      {\textbf{MATHÉMATIQUES}\\\textbf{Devoir maison}}
+      {\textbf{MATHÉMATIQUES}\\\textbf{\Jd Devoir maison}}
     \lohead[NOM :\\Prénom :]{NOM :\\Prénom :}
     \rohead[\@date\\]{\@date\\}
     \cehead[]{}
diff --git a/shortcuts/shortcuts.sty b/shortcuts/shortcuts.sty
index 57efa03..2710192 100644
--- a/shortcuts/shortcuts.sty
+++ b/shortcuts/shortcuts.sty
@@ -143,6 +143,11 @@
 \NewDocumentCommand \n { g } {
   \num{#1}
 }
+
+% use € to print \euro symbol
+%%
+\catcode `\€=\active
+\def €{\euro }
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 
@@ -202,16 +207,22 @@
   \ensuremath{ \left(O\: ;\: x\: ;\: y\right) }
 }
 
-%% vector arrow redefinition
+%% frame (O;u;v)
 %%
-\renewcommand{\Vec}[1]{
-  \ensuremath{ \overrightarrow{#1\vphantom(} }
+\NewDocumentCommand \ouv { } {
+  \ensuremath{ \left(O\: ;\: \vec{u}\: ;\: \vec{v}\right) }
 }
 
+%% vector arrow redefinition
+%%
 \renewcommand{\vec}[1]{
-  \ensuremath{ \overrightarrow{#1\vphantom(} }
+  \ensuremath{ \overrightarrow{\, \mathstrut#1 \,} }
 }
 
+% \renewcommand{\vec}[1]{
+%   \ensuremath{ \overrightarrow{#1\vphantom(} }
+% }
+
 %% coordinates
 %%
 \NewDocumentCommand \coord { s m }{
@@ -381,7 +392,7 @@
 %% \nicefrac shortcut
 %%
 \NewDocumentCommand \sfrac{ G{1} G{2}  } {
-  \nicefrac{#1}{#2}
+    \nicefrac{#1}{#2}
 }
 
 %% limits
@@ -402,9 +413,24 @@
 %  \ensuremath{\ell}
 %}
 
-% %% renewed \bar command
-% %%
-% \renewcommand{\bar}[1]{\overline{#1}}
+%% renewed \bar command
+%%
+\NewDocumentCommand \barre { g } {
+    {\overline{\,\mathstrut#1\,}}
+}
+\RenewDocumentCommand \bar { g } {
+    {\overline{\,\mathstrut#1\,}}
+}
+
+%% Complex numbers
+%%
+\NewDocumentCommand \re { G{z} } {
+    \ensuremath{\operatorname{Re}(#1)}
+}
+
+\NewDocumentCommand \im { G{z} } {
+    \ensuremath{\operatorname{Im}(#1)}
+}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%