Before Origin 2018, if user copied some cell(s) in Excel and then pasted it into Graph window, it was pasted as Excel object by default. User must use Edit: Paste Special... to paste as unformatted text.

In Origin 2018, the cells will be pasted as text by default. If user wants to paste as Excel object, user can choose Edit: Paste Special... or context menu and choose to paste as "Microsoft Excel Worksheet".

Set system variable @PXLTXT=0 to change back to old behavior.