How do you post many variation "options" in ebay?

Hi,

I see sellers listing many variation options (as drop-downs) in their ebay listings; however, when you go to the listing editor and want to add the "options", it only lets you do to add them one by one.

So for example - if you're selling 1,000 baseball cards - it doesn't make sense to add each title of the card one by one; if I already have them all in excel or a notepad, is there a way to copy/paste them into the ebay listing variation options?

I tried to separate the titles by commas, colons, periods, etc. but it still only allows you to type one at a time.

Thanks

ebay.com api

you can upload your entire variation listing using a spreadsheet template from seller hub