Hey, @nadinemu !
Lulu here from the Shopify Support team. Thanks for reaching out here, and I’ll be more than happy to help you out.
I can totally see where you are coming from especially with home deliveries. Unfortunately, as the customer enters their shipping address at the checkout and while an app would be great to drop a pin or similar, no customisations can be done to the checkout at all unless you are on the Shopify Plus plan.
There isn’t actually the ability to edit the code for the checkout by anyone. The primary reasons behind not being able to edit the checkout CSS are around security, responsiveness, and maintaining PCI compliance. If we had customized checkouts, any updates or improvements that we wanted to make would have to be made on a store-by-store basis. As you can imagine, this would take a very long time! It would also make the customer suffer if the checkout was then glitchy/not updated correctly.
We still allow you to customize your checkout style (as noted in this guide), such as changing the colours and adding a banner to the top of the checkout page. However, ultimately these systems are in place with the primary focus of making our platform more secure for you and your customers. We hope you understand that it’s with your best interest at heart.
There is an option to autofill the shipping address though which may be handy to help customers pick the exact address at the checkout? It gives customers address suggestions when they enter their shipping and billing address. You can toggle that option on by clicking Settings > Checkout > “Enable address autocompletion”.
I hope this helps but let me know if you have any other questions at all, always happy to help!
Kind regards,
Lulu