A custom link allows you to share your forms at a URL like:

formcrafts.com/a/my-form

Some pricing plans also have support for custom domains which further allows you to set a URL like:

company.formcrafts.com/my-form

In both cases each form has a form path (which is my-form in the above examples). This can be configured individually for each form.

Go to FormCrafts dashboard and edit your form. Click on Share / Embed on the top-left corner.

Under the Link tab look for Custom Link. Here you can modify the form path for your form.

Custom subdomain form link