The labels layout happens exclusively in the List itself on the Labels tab. Create separate lists for each size (S, M, L).
Open the Labels tab.
Enter the Widths, Heights and Margins of the labels used.
Assign an Output setting (watermark) with Printer settings (printer, tray etc.). (Setting up output settings)
Select a Size S, M or L for the list. Only lists with the appropriate size will be offered in the segment when the corresponding labels are printed.
Go to Insert fields at the top left and drag the fields in the list that you want to display on the labels from the left-hand list to the right-hand list while holding down the left mouse button.
Above the list, activate the Values to only display the contents of the selected fields.
Activate Labels to also display the field labels.
Format the font in the input area at the bottom right.
Add Images or logos by clicking on the camera icon in the left-hand toolbar if necessary.