Is it possible? Need to change a bunch of drawings.
You need to add a page setup to a bunch of drawings? You can use the batch drawing converter for this. Just convert from the same format to the same format and make sure "Include Page Setups" is checked. You can add page setups to many drawings at once this way...it will wipe out any other page setups in the drawings, so make sure you have included all the ones you want. HTH
You could use something like this. (vlax-invoke al "RefreshPlotDeviceInfo") (vlax-put al "ConfigName" "MyPlotter.pc3") (vlax-put al "StyleSheet" "MyCTBFile.ctb") (vlax-put al "CanonicalMediaName" "MySheetSize") (vlax-put al "StandardScale" '0) (vlax-put al "PlotRotation" '0) (vlax-put al "PaperUnits" '0) ....where "al" is a reference to the ActiveLayout object.