When you make a new Layout a new Page Setup called *Layout1*
You see the printable area in Layout. This is a dashed rectangle.
In order to remove that rectangles you set the option via UI:
Go to TOOLS > OPTIONS > DISPLAY > LAYOUT ELEMENTS > Uncheck "Display printable area"
or to do the same in API
void turnOffPrintableArea()
{
AcApLayoutManager* pApLayoutMgr =
(AcApLayoutManager*)acdbHostApplicationServices()->layoutManager();
if (pApLayoutMgr != NULL) {
pApLayoutMgr->setShowPaperMargins(false);
pApLayoutMgr->updateCurrentPaper();
}
}
Unfortunately, the interface AcApLayoutManager for application-specific routines that manipulate, access AcDbLayout objects and controls layout related GUI attributes is not exposed to NET.