diff --git a/InForm/UiEditor.bas b/InForm/UiEditor.bas
index 1adfd60..d37a2f9 100644
--- a/InForm/UiEditor.bas
+++ b/InForm/UiEditor.bas
@@ -134,28 +134,6 @@ TYPE newInputBox
     Sent AS _BYTE
 END TYPE
 
-CONST OffsetEditorPID = 1
-CONST OffsetPreviewPID = 5
-CONST OffsetWindowLeft = 9
-CONST OffsetWindowTop = 11
-CONST OffsetNewControl = 13
-CONST OffsetNewDataFromEditor = 15
-CONST OffsetNewDataFromPreview = 17
-CONST OffsetTotalControlsSelected = 19
-CONST OffsetFormID = 23
-CONST OffsetFirstSelectedID = 27
-CONST OffsetMenuPanelIsON = 31
-CONST OffsetAutoName = 33
-CONST OffsetShowPosSize = 35
-CONST OffsetSnapLines = 37
-CONST OffsetPropertyChanged = 39
-CONST OffsetMouseSwapped = 41
-CONST OffsetDefaultButtonID = 43
-CONST OffsetOriginalImageWidth = 47
-CONST OffsetOriginalImageHeight = 49
-CONST OffsetSelectionRectangle = 51
-CONST OffsetPropertyValue = 53
-
 REDIM SHARED PreviewCaptions(0) AS STRING
 REDIM SHARED PreviewTexts(0) AS STRING
 REDIM SHARED PreviewMasks(0) AS STRING
diff --git a/InForm/UiEditorPreview.bas b/InForm/UiEditorPreview.bas
index 8ae3b6c..ab3e503 100644
--- a/InForm/UiEditorPreview.bas
+++ b/InForm/UiEditorPreview.bas
@@ -1,27 +1,5 @@
 OPTION _EXPLICIT
 
-CONST OffsetEditorPID = 1
-CONST OffsetPreviewPID = 5
-CONST OffsetWindowLeft = 9
-CONST OffsetWindowTop = 11
-CONST OffsetNewControl = 13
-CONST OffsetNewDataFromEditor = 15
-CONST OffsetNewDataFromPreview = 17
-CONST OffsetTotalControlsSelected = 19
-CONST OffsetFormID = 23
-CONST OffsetFirstSelectedID = 27
-CONST OffsetMenuPanelIsON = 31
-CONST OffsetAutoName = 33
-CONST OffsetShowPosSize = 35
-CONST OffsetSnapLines = 37
-CONST OffsetPropertyChanged = 39
-CONST OffsetMouseSwapped = 41
-CONST OffsetDefaultButtonID = 43
-CONST OffsetOriginalImageWidth = 47
-CONST OffsetOriginalImageHeight = 49
-CONST OffsetSelectionRectangle = 51
-CONST OffsetPropertyValue = 53
-
 DIM SHARED UiEditorPID AS LONG, ExeIcon AS LONG
 DIM SHARED AutoNameControls AS _BYTE
 DIM SHARED UndoPointer AS INTEGER, TotalUndoImages AS INTEGER, MidUndo AS _BYTE
diff --git a/InForm/docs/undo file format.txt b/InForm/docs/undo file format.txt
deleted file mode 100644
index b34de1a..0000000
--- a/InForm/docs/undo file format.txt	
+++ /dev/null
@@ -1,25 +0,0 @@
-InForm - GUI library for QB64
-Fellippe Heitor, 2016-2018 - fellippe@qb64.org - @fellippeheitor
-https://github.com/FellippeHeitor/InForm
------------------------------------------------------------
-Below is the binary format for undo/redo data saved to file
-'InForm/UiEditorUndo.dat'. Each time a new control is created or
-a new property is changed, the preview saves the current state to
-this file and adjusts 'total undo images' and sets 'undo pointer'
-accordingly.
-
-This format is used in UiEditorPreview's methods:
-    - SaveUndoImage
-    - RestoreUndoImage
-    - RestoreRedoImage
------------------------------------------------------------
-
-MAX UNDO ENTRIES: 100
-offset  data            description
-1       INTEGER         undo pointer
-3       INTEGER         total undo images
-
-Directory
-entry size: 8 bytes
-        LONG       size&
-        size&      backup form data