LibreOffice 7.5 Help
Click the button More in the Pivot Table dialog. The dialog will be extended.
You can select a named range in which the pivot table is to be created, from the Results to box. If the results range does not have a name, enter the coordinates of the upper left cell of the range into the field to the right of the Results to box. You can also click on the appropriate cell to have the coordinates entered accordingly.
If you mark the Ignore empty rows check box, they will not be taken into account when the pivot table is created.
If the Identify categories check box is marked, the categories will be identified by their headings and assigned accordingly when the pivot table is created.