With Monto Affiliates, you can either signup new affiliates for your store by entering their information manually here: https://www.monto.io/aff
Or you can send potential affiliates to a link and let them signup for themselves.
To find your custom signup link, go to the Monto configure page: https://www.monto.io/aff/configure
This is great to put in your site's footer or email signature so that any customers who want to earn a commission can do so easily.
How to Find the Link
Ensure you have entered a custom subdomain that matches your brand here:

Going to that URL will take visitors to your Affiliate Sign-In page. Beneath the sign in form is a link to "Sign Up". This is for signing up as a new affiliate.
The direct link to this page is:
https://YOURSUBDOMAIN.monto.io/affiliates/register
Replace "YOURSUBDOMAIN" with the subdomain you selected in the configure page.

You can customize the logo that goes on this page in your shop Settings > Options panel.