This enumeration identifies revertible mark actions.
Values:
| IG_ARTX_UNDO_NONE | Corresponds to empty operation. Should not be used. |
| IG_ARTX_UNDO_MARK_ATTRIBUTES | Specifies whether to record annotation attribute modification to undo base. |
| IG_ARTX_UNDO_MARK_SELECT | Specifies whether to record annotation selecting operations to undo base. |
| IG_ARTX_UNDO_MARK_DELETE | Specifies whether to record annotation delete operation to undo base. |
| IG_ARTX_UNDO_MARK_CREATE | Specifies whether to record annotation creation operation to undo base. |
| IG_ARTX_UNDO_GROUP_ATTRIBUTES | Specifies whether to record group attribute modification to undo base. |
| IG_ARTX_UNDO_GROUP_ZORDER | Specifies whether to record group z-order modification to undo base. |
| IG_ARTX_UNDO_GROUP_DELETE | Specifies whether to record group creation operation to undo base. |
| IG_ARTX_UNDO_GROUP_CREATE | Specifies whether to record group delete operation to undo base. |