diff --git a/documentation/Layout.md b/documentation/Layout.md
index 53df78c..07f1d27 100644
--- a/documentation/Layout.md
+++ b/documentation/Layout.md
@@ -177,6 +177,31 @@ df.iloc[0,0] = 'New Value'
 tables.update(TableKey='Material Properties 01 - General', data=df, apply=True)
 ```
 
+## Select
+elect = sap.Select
+
+select.all()                    #Select all objects
+select.clear()                  #Deselect all objects
+
+select.constraint(name='Diaph1')#Select points in constraint
+select.constraint(name='Diaph1', reverse=True)  #Deselect points in constraint
+
+select.invert()                 #Invert selections
+select.selected                 #Returns list of selected objects
+select.previous()               #restores the previous selection
+
+#Selection based on plane
+select.in_plane(pointname='1', plane='XY')  #Select in XY plane
+select.in_plane(pointname='2', plane='YZ', reverse=False)   #Deselect
+
+#Select by property
+select.property(type='Area', name='ASEC1')
+select.property(type='Cable', name='CAB1', reverse=True)
+select.property(type='Frame', name='FSEC1')
+select.property(type='Link', name='GAP1', reverse=True)
+select.property(type='Material', name='A992Fy50')
+select.property(type='Solid', name='SOLID1', reverse=True)
+select.property(type='Tendon', name='TEN1')
 ## Loads
 
 Control the definition and assignments of loads.