Can I rename the optional “Name your Job” field, on the product detail page in the storefront, and can I make it a mandatory field?

It is not possible to rename the “Name your Job” field or make it mandatory. As an alternative you can use the option of Acceptance Text (Path: Admin > Site > Product > Product Detail Page > I accept Requirement and Acceptance Text), here you can add a text like “Name your Job (Mandatory)” and can make this field a mandatory field. To reduce the confusion that user may experience, you can remove the original “Name your Job” field from product detail page through Admin > Site > Product > Checkout Options for this product > Uncheck the box “Allow Edit of Product Name on Ordering”.

You can also add a Form on the product detail page that will have single field Text Box and you can name the box as “Name your Job” and make it a mandatory field. As mentioned above you can remove the “Name your job field” from Pressero admin, so that it does not confuse the users. To create a form, go to: Path: Admin > Preferences > Forms. To place it on a product page, go to: Admin > Sites > Select Site > Products > Select Product > Forms.