There are 3 different way to export file and 2 way import file
Step1: Export 1st way is Go to “Product layouts.com” > Hover demo > enter a layouts
Step2: Download a design
Step3: Import 1st way is goto shortcode list> import
Step4: Browse file
Step5: Select downloaded Json file> open >Import layouts
Step6: Export 2nd way is goto shortcode list> export > same way import
Step7: 3rd way export and 2nd way import is: open Short code list
Step8: Export in action option > After download > import in action option
Step9: Browse file > Select downloaded Json file> open >Import layouts
Step10: After import set a new name > update