I do not see any format for 4x6 cards in the media type within the print menu. how do I change this?
Changed category to English. Maybe tag must be writer, not common.
The list is mostly populated by your printer driver. You haven’t given your operating system nor printer brand and model. If you are on Windows then install the printer manufacturer’s printer driver, that should lengthen the list of paper sizes as well as giving better control of the printer.
You can add 4 x 6 in User defined size but it is more likely to be remembered if added in the printer driver panel.
thank you for that. I have Mac OS . Epson Workforce printer WF 2650 (older one)
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Have you set the paper size to 4" x 6"? The printer lists it as a default size so you should be able to select it in the printer driver under Paper Size.
There is a Writer Guide 7.2 MacOs Edition that might be helpful, English documentation | LibreOffice Documentation - LibreOffice User Guides
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How do you solved it? Following EarnestAl comment?