Sending an array as form-data

You can send an array in form-data by using the same name for multiple keys, and putting values in each one. Please see the screenshots below for examples (substitute my_array ​ for any name you want):

In Bulk Edit mode:

In Key-Value Edit mode:

To test it out, you can try sending a POST request to https://postman-echo.com/post, and check the response: