Options.RevisedLinesMark (Word)

Returns or sets the placement of changed lines in a document with tracked changes. Possible return values are wdRevisedLinesMarkLeftBorder - In the left border, wdRevisedLinesMarkNone - Not displayed, wdRevisedLinesMarkOutsideBorder - Outside the border, wdRevisedLinesMarkRightBorder - In the right border.

Options.RevisedLinesMark = wdRevisedLinesMarkLeftBorder