How to copy some of the form fields to a different form?

I select a block of fields and do a <ctrl> c to copy them.  I get a message that the fields have been added to the clipboard.  However, when I position on a different form and do a <ctrl> v to place them, nothing happens.

How can I copy a block of input fields from one form to another?

If I understood your issue correctly, you are trying to copy some of the form fields from one form to a different form, by selecting like this?

Unfortunately, it is not possible to copy some of the form fields to another form. The only way to achieve this is by cloning the form.

Here is the guide: How-to-Clone-an-Existing-Form-from-Your-Account

Let us know if you need any further assistance.