diff --git a/sources/autoNum/assignvariables.cpp b/sources/autoNum/assignvariables.cpp
index .. 100644
--- a/sources/autoNum/assignvariables.cpp
+++ b/sources/autoNum/assignvariables.cpp
@@ -213,7 +213,7 @@
 
 			if (m_element)
 			{
-				m_assigned_label.replace("%c", QString::number(m_diagram->convertPosition(m_element->scenePos()).number()));
+				m_assigned_label.replace("%c", QString::number(m_diagram->convertPosition(m_element->scenePos()).number() - 1));
 				m_assigned_label.replace("%l", m_diagram->convertPosition(m_element->scenePos()).letter());
 				m_assigned_label.replace("%prefix", m_element->getPrefix());
 			}
diff --git a/sources/bordertitleblock.cpp b/sources/bordertitleblock.cpp
index .. 100644
--- a/sources/bordertitleblock.cpp
+++ b/sources/bordertitleblock.cpp
@@ -464,7 +464,7 @@
 				columns_header_height_
 			);
 			painter -> drawRect(numbered_rectangle);
-			painter -> drawText(numbered_rectangle, Qt::AlignVCenter | Qt::AlignCenter, QString("%1").arg(i));
+			painter -> drawText(numbered_rectangle, Qt::AlignVCenter | Qt::AlignCenter, QString("%1").arg(i - 1));
 		}
 	}
 	
@@ -541,7 +541,7 @@
 			double recWidth = columns_width_;
 			double recHeight = columns_header_height_;
 			Createdxf::drawRectangle(file_path, xCoord, yCoord, recWidth, recHeight, color);
-			Createdxf::drawTextAligned(file_path, QString::number(i), xCoord,
+			Createdxf::drawTextAligned(file_path, QString::number(i - 1), xCoord,
 									   yCoord + recHeight*0.5, recHeight*0.7, 0, 0, 1, 2, xCoord+recWidth/2, color, 0);
 		}
 	}
diff --git a/sources/diagramposition.cpp b/sources/diagramposition.cpp
index .. 100644
--- a/sources/diagramposition.cpp
+++ b/sources/diagramposition.cpp
@@ -59,7 +59,7 @@
 	if (isOutOfBounds()) {
 		return("-");
 	}
-	return(QString("%1%2").arg(letter_).arg(number_));
+	return(QString("%1%2").arg(letter_).arg(number_ - 1));
 }
 
 /**