# Duplicating a selected worksheet

Though most Save operations are on whole workspaces, occasionally a data matrix needs to be saved externally, perhaps because it is needed in a different workspace or with other software. In order to protect against overwriting an original, external, data file with a version which is under a (possibly temporary) selection, **File>Save Data As** will ignore selections and save the whole data. To force a save of <u>only</u> the selection, you must first duplicate the selected sheet, with **Tools> Duplicate**. Do this on the selected form of the <ins>WA fish diets %vol</ins> data – which has excluded A9, B3, B4 – to create a new datasheet, <ins>Data2</ins>, which will now not contain these samples when saved.