Methods that call CADResetUndo internally.
They always clear undo data.
CADAcceptDXF
CADCancelDXF
CADClear
CADCommand (except for command kCADCommandEditSelectAll)
CADImportDXF
CADLoadFromBlob
CADLoadFromFile
CADLoadFromPict
CADResetUndo
Methods that call CADAutoResetUndo internally.
They clear undo data if theAutoResetUndoFlag of the area is kCADTrue
(see CADGetUndoPrefs and CADSetUndoPrefs).
CADAddBlock
CADAddCircle
CADAddCircleArc
CADAddEllipse
CADAddEllipseArc
CADAddImage
CADAddInsert
CADAddInsertXY
CADAddLayer
CADAddLine
CADAddPolyLine
CADAddRectangle
CADAddSquare
CADAddString
CADAddSubLayer
CADAlign
CADBlend
CADCopyArrays (target)
CADCopyAttributes (target)
CADCopyBlocks (target)
CADCopyByMatrix (target)
CADCopyLayers (target)
CADCopyObjByMatrix (target)
CADCopyObjTo (target)
CADCopyTo (target)
CADFlipObj
CADImportImage
CADLengthenObj
CADMirror
CADMoveByMatrix (source and target)
CADMoveTo (source and target)
CADMoveToBack
CADMoveToFront
CADPageSetup
CADPolyUndouble
CADPrint
CADPrintToPDF
CADRemoveArray
CADRemoveBlock
CADRemoveLayer
CADRemoveObj
CADRotateObj
CADRotate
CADScale
CADSetBlockName
CADSetCircleArc
CADSetCircle
CADSetClipBox
CADSetColor
CADSetDrawSize
CADSetEllipseArc
CADSetEllipse
CADSetFill
CADSetFont
CADSetHatch
CADSetImage
CADSetImageXY
CADSetInsertColor
CADSetInsert
CADSetInsertID
CADSetInsertXY
CADSetKeyMask
CADSetLayer
CADSetLayerAttributes
CADSetLine
CADSetLineType
CADSetLineWidth
CADSetLock
CADSetMarking
CADSetObjLock
CADSetPolyAngle
CADSetPolyLine
CADSetPrintSpecs
CADSetRectangle
CADSetScale
CADSetSquare
CADSetString
CADSetStringXY
CADSetUnit
CADShear
CADSplitPoly
CADStretchObj
CADTransform
CADTranslate
Please note that the following methods do not clear undo data:
CADSetBlockKey
CADSetCurrentLayer
CADSetKey
CADSetKeyArray
CADSetLayerOrder
CADSetLayerKey
CADSetObjKey
Also see the chapter on Events.