diff --git a/tutorials/editor_basics.md b/tutorials/editor_basics.md
index 42647db6b..0fa1f0d25 100644
--- a/tutorials/editor_basics.md
+++ b/tutorials/editor_basics.md
@@ -124,7 +124,27 @@ inserting and deleting symbols and strings, and manipulating with text blocks, a
 [EditorModificationUtil.java] (https://github.com/JetBrains/intellij-community/blob/master/platform/platform-api/src/com/intellij/openapi/editor/EditorModificationUtil.java)
 
 #Editor coordinates system. Positions and offsets.
-**TODO**
+Every caret in the editor has a set of properties describing it's coordinates. These properties can be accessed by obtaining a
+[caret model instance] (https://github.com/JetBrains/intellij-community/blob/master/platform/editor-ui-api/src/com/intellij/openapi/editor/CaretModel.java).
+
+##Logical position
+[LogicalPosition.java] (https://github.com/JetBrains/intellij-community/blob/master/platform/editor-ui-api/src/com/intellij/openapi/editor/LogicalPosition.java)
+represents a line and a column of the current logical position of the caret. Logical positions ignore folding -
+for example, if the top 10 lines of the document are folded, the 10th line in the document will have the line number 10 in its logical position.
+Logical position may store additional parameters that define its mapping to
+[VisualPosition.java] (https://github.com/JetBrains/intellij-community/blob/master/platform/editor-ui-api/src/com/intellij/openapi/editor/VisualPosition.java).
+Rationale is that single logical pair matches soft wrap-introduced virtual space, i.e. different visual positions
+correspond to the same logical position. It's convenient to store exact visual location details within the logical
+position in order to relief further 'logical position' -> 'visual position' mapping.
+
+##Visual position
+[VisualPosition.java] (https://github.com/JetBrains/intellij-community/blob/master/platform/editor-ui-api/src/com/intellij/openapi/editor/VisualPosition.java)
+represent a visual position and may very from the corresponding logical position.
+Visual positions take folding into account - for example, if the top 10 lines of the document are folded, the 10th line in the document will have the line number 1 in its visual position.
+
+##Offset
+An absolute offset for a given caret position is accessible by calling
+```int offset = caretModel.getOffset();```
 
 **TODO** [Link to threading issue]