It could be very useful to place and align elements, conductors, etc,  a workaround is to use xgrid = 1, ygrid = 25 or more. 

xgrid = 25, ygrid = 1

thanks, please use qtcreator to make a clean diff file.
Go to Tools -> Subversion -> Diff project "qelectrotech" 
Now save patch and send me here.

Or you could use also in your local directory Subversion to create a diff :
svn diff > my_changes.diff

La distance de grille entre deux points est maintenant de 10

J'ai réussi à ajuster la grille.
Vous pouvez maintenant choisir de 1 à 10

Ce qui suit doit arriver dans les fichiers suivants.

Now the grid distance between two points is 10

I managed to adjust the Grid.
You can now choose from 1 to 10 

The following must happen in the following files.

sources/diagram.h
supprimer Const dans les lignes 76 et 78
Delete Const in lines 76 and 78
76 - static int xGrid;  //static const int xGrid;
78 - static int yGrid;  //static const int yGrid;

sources/diagram.cpp
supprimer Const dans les lignes 41 et 42
Delete Const in lines 41 and 42 41 - int Diagram::xGrid  = 10;  //const int   Diagram::xGrid  = 10;
42 - int Diagram::yGrid  = 10;  //const int   Diagram::yGrid  = 10;

Ajouter les lignes suivantes
Après les paramètres QSettings;

Add the following lines
After QSettings settings;

153 - int xGrid = settings.value("DiagramEditor_xGrid_sb", Diagram::xGrid).toInt();
154 - int yGrid = settings.value("DiagramEditor_yGrid_sb", Diagram::yGrid).toInt();

sources/ui/configpage/generalconfigurationpage.cpp
Ajouter les lignes suivantes
Après les paramètres QSettings;

Add the following lines
After QSettings settings;
38 - ui->DiagramEditor_xGrid_sb->setValue(settings.value("DiagramEditor_xGrid_sb", 10).toInt());
39 - ui->DiagramEditor_yGrid_sb->setValue(settings.value("DiagramEditor_yGrid_sb", 10).toInt());

Ajouter les lignes suivantes
Add the following lines
142 - settings.setValue("DiagramEditor_xGrid_sb", ui->DiagramEditor_xGrid_sb->value());
143 - settings.setValue("DiagramEditor_yGrid_sb", ui->DiagramEditor_yGrid_sb->value());

Forms/sources/ui/configpage/generalconfigurationpage.ui

Maintenant, utilisez un éditeur de texte et non Qtcreator.
J'utilise Mousepad.
Ajouter les lignes suivantes de la ligne 467
C'est entre <widget> et <widget>

Now use a text editor and not Qtcreator.
I use Mousepad.
Add the following lines from line 467
It's between <widget> and <widget>

      <widget class="QWidget" name="Grid">
      <attribute name="title">
       <string>Grid</string>
      </attribute>
      <widget class="QLabel" name="Label_Diagram_xGrid">
       <property name="geometry">
        <rect>
         <x>20</x>
         <y>10</y>
         <width>191</width>
         <height>30</height>
        </rect>
       </property>
       <property name="text">
        <string>DiagramEditor xGrid</string>
       </property>
      </widget>
      <widget class="QLabel" name="Label_Diagram_yGrid">
       <property name="geometry">
        <rect>
         <x>20</x>
         <y>50</y>
         <width>191</width>
         <height>30</height>
        </rect>
       </property>
       <property name="text">
        <string>DiagramEditor yGrid</string>
       </property>
      </widget>
      <widget class="QSpinBox" name="DiagramEditor_xGrid_sb">
       <property name="geometry">
        <rect>
         <x>220</x>
         <y>10</y>
         <width>55</width>
         <height>30</height>
        </rect>
       </property>
       <property name="minimum">
        <number>1</number>
       </property>
       <property name="maximum">
        <number>10</number>
       </property>
       <property name="singleStep">
        <number>1</number>
       </property>
       <property name="value">
        <number>10</number>
       </property>
      </widget>
      <widget class="QSpinBox" name="DiagramEditor_yGrid_sb">
       <property name="geometry">
        <rect>
         <x>220</x>
         <y>50</y>
         <width>55</width>
         <height>30</height>
        </rect>
       </property>
       <property name="minimum">
        <number>1</number>
       </property>
       <property name="maximum">
        <number>10</number>
       </property>
       <property name="value">
        <number>10</number>
       </property>
      </widget>
      <widget class="QLabel" name="Label_DiagramGrid">
       <property name="geometry">
        <rect>
         <x>20</x>
         <y>100</y>
         <width>251</width>
         <height>30</height>
        </rect>
       </property>
       <property name="text">
        <string>Grid on/off = See the change</string>
       </property>
     </widget>
    </widget>