Additive properties for multiple molecules needed in Chem Draw 15

Dear all,

I am using ChemDraw Professional 15.1.0.144 on a PC. When I draw several molecules and select them, their added properties (mass, sum formula etc.) are being correctly displayed in the Analysis window. However, if I click on Paste, the selected properties of each individual molecule is inserted in the document. In several cases, like a salt, it would be highly desirable that the added properties would be inserted. Am I missing something?

Thanks a lot for your help!

Best regards

Bernhard