diff --git a/docs/technical_information.md b/docs/technical_information.md
index a143813677c93bc152b21fafedf897c93c302cce..0aba6582059f44e0a951e2792b6494d0a6810949 100644
--- a/docs/technical_information.md
+++ b/docs/technical_information.md
@@ -266,7 +266,14 @@ Using **Mesh Simplification** checkbox helps reducing the number of triangles af
 
 ---
 
-## Units and Coordinate System
+## Units, Coordinate System, Projections
+
+### Units
+
+Model units may be either meters (m, default) or kilometers (km), this can be selected when [creating a model](./workflows/create.md#create-a-model).
+You can check the units using **Preferences** (++"Edit"++ --> ++"Preferences"++), in the **Units Tab**:
+
+![](./media/preferences_units.png)
 
 **IGMAS+** is using the following coordinate system ([ENU system](./glossary.md#enu-system)):
 
@@ -274,9 +281,7 @@ Using **Mesh Simplification** checkbox helps reducing the number of triangles af
 - y positive to the **N**orth
 - z positive to the top (**U**p)
 
-![image](./media/coordinate_system.png)
-
-Model units may be either meters (m, default) or kilometers (km), this can be selected when [creating a model](./workflows/create.md#create-a-model).
+![Coordinate System](./media/coordinate_system.png)
 
 ### Projections
 
@@ -290,13 +295,11 @@ Use the **Property editor** tab of the **Object Tree** entry **Model** to get th
 
 #### Projection: unknown
 
-Use this setting, if you don't know the coordinate system, if you use
-local coordinates (not referred to world coordinates) or if you are not
-interested in a visualization with WorldWind.
+Use this setting, if you don't know the projection being used, if you use local coordinates (not referred to world coordinates) or if you are not interested in visualization with WorldWind.
 
 #### Projection: Mercator
 
-The Mercator projection is the easiest way to transfer spherical (geographical) coordinates into plane (orthogonal) coordinates. 
+The Mercator projection is the easiest way to transfer spherical (geographical) coordinates into plane (orthogonal) coordinates.
 Use the following transfer functions - they are exact and easy to use:
 
 Forward (spherical into orthogonal):