paul2009

@Mate Squarespace just rolled out a new, international-friendly Form Block. It has replaced the old Form Block on all Squarespace 7.0 and 7.1 sites.
With this new Form Block, Post-submit HTML no longer supports scripts (the content in script tags is ignored). 
You can raise this with the Internationalization team as a feature request by raising a support ticket with Squarespace Customer Care. 
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I've asked for this several times but there are no known plans at this time. To make a feature request and your voice to this, please raise a ticket with Squarespace Customer Care.

See also Starting over. As it explains, it is not currently possible to change the template on a Squarespace 7.1 site, or move an existing website subscription from one site to another, so you'll need to cancel the existing subscription and start a new one on the new site.

Harris is a York-family template on Squarespace 7.0. The designer of this template choose to highlight links by making them appear in a different colour. The underline only appears when when you hover over the link:

You should be able to make the underline appear all the time by adding this to Design > Custom CSS:
#content a { text-decoration: underline; } Let me know how you get on.
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Squarespace don't support the full range of payment options that Stripe do and unfortunately you cannot change this, even with code.
 
This forum is not monitored for product feature requests. To raise a feature request, open a ticket through Customer Support.
 
If you need Bancontact, alternative commerce options include Shopify (instead of Squarespace) or Shopify buttons on Squarespace.
 

As I mentioned in this 2020 post, Squarespace does not support zero-rated VAT for physical products and there are no useful workarounds for this issue. The situation is unchanged today.
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No, you cannot change the "From" address on Form Submission emails. These arrive from form-submission@squarespace.info. The only way to change this is to send the emails to a third-party automated service and then forward them on.
However, you can change the email address that appears on Email Notifications generated by Commerce, for example:
Order confirmed Ready for pickup Order fulfilled Order refunded Digital downloads Donation confirmed Payment declined Product not available For more details see Reply-To and From Email addresses.

This is a Custom Product Form.
If you want to remove it, edit the Product and then scroll down through the settings to Custom Forms and choose No Form Required to disable the Product Form.

If you want to keep the form and fix the button (which is currently set to white text and white border on a white background) you should be able to change the colours in the Site Styles panel. This button is a Primary button. Here's what it looked like when I changed the colours to black:

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You can add a name when using a Newsletter Block on the page, but Promotional Popups only prompt for an email address. It isn't possible to change this as they don't support custom code.
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You cannot remove the cart page or the commerce features but you can hide the cart icon so that customers don't stumble upon them.
This guide explains how to hide the cart icon: Shopping cart icon display.
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It looks like the Line Height for these headings has been accidentally set to 0em in the Site Styles panel. You should be able to adjust this to 1.3em or similar to prevent it wrapping on itself:

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Firstly, I have to comment on the site itself @TWBDesign
It's an amazing example of meaningful content and beautiful, intentional design 👏 👏. 
I love all of it.

Regarding the tags, I was able to fix this with:
span.blog-item-tag-wrapper { white-space: nowrap; } Toggling the CSS on and off, did this:

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Everything in a light grey font. It isn’t CSS and looks like it has just been pasted there accidentally. 

This depends on so many factors, including the version and template being used and whether they need to retain 'backend' data like customer details, order details and so on.
If you want to upgrade from v7.0 to v7.1, I would always recommend updating the existing site rather than starting a new one. That said, regardless of whether you build new or update the existing site, changes can cause a site's search ranking to dip temporarily. However, if you follow SEO best practice to optimise the site, you should be able to limit any impact and potentially help the site's SEO performance in the long run.
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For this code to work, you'll need to add it to the code injection footer. You can do this in Settings > Developer Tools > Code Injection.
If you've added it there and experienced problems, please provide a link to the page on your site and explain a little more about your goal.
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The margin above the AfterPay messaging is set to minus 22 pixels by default, placing it tight against the pricing. Reducing this to something like -10px will add some space.
The AfterPay messaging uses 'browser safe' fonts by default (Helvetica Neue, Helvetica, Arial, sans-serif) but these can be customised easily to a font-family you are using on the site, for example Brandon Grotesque. Optionally you can also adjust the font weight and the letter spacing to get the look that you want.
The AfterPay messaging uses the class '_2NN0IlogY' on the product page and the class '_3Dgr8g-LT' on the cart page, so if you want to change it in both places, you'll need to use both, For example, using the following CSS you can set independent settings for each page type:
/* Afterpay messaging on product page */ ._2NN0IlogY { margin-top: -10px; font-weight: 300; font-family: 'brandon-grotesque'; letter-spacing: 1px; } /* Afterpay messaging on cart page */ ._3Dgr8g-LT { font-weight: 300!important; font-family: 'brandon-grotesque'!important; letter-spacing: 1px!important; } Notes:
This solution is CSS. Add to Design > Custom CSS. CSS changes to the cart are not immediate. You will need to refresh your browser for these to be visible.   If this post has helped you, please click a 'Like' or 'Thanks' icon below  ⬇️

No, not unless you are already an Administrator on the site. Site Owners and Administrators are the only roles that can set contributor permissions. Perhaps you can guide them by sharing their screen during a video call or by creating a Loom video for them to follow?

If you haven't read through this already, I recommend the support guide: Connecting a third-party subdomain to your Squarespace site. 
If you have further questions, I recommend getting on touch with Squarespace Customer Care using their online chat service as this will require some troubleshooting, and we don't have access to the backend of the site.

Have you considered offering a discount code to those who need the lower pricing?

If you need to automate it, you can use the Squarespace Orders API to access details of products that have been purchased on Squarespace commerce. You can use a third party Robotic Process Automation (RPA) tool like Parabola or Make (formally Integromat) to pull this data from the API and send it to your supplier in the required format.
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This isn't possible on Acuity/Squarespace Scheduling. You'll need a different scheduling solution for bookings that go past midnight unless you want to add them manually on the client's behalf.

If the site will be on a Business Plan or above, here's something to get you started. Add it to Settings > Developer Tools > Code Injection > Footer. 
<!--- Inform user before allowing them to leave the site accidentally ---->  <script>   Array.from(document.querySelectorAll("a")).filter(l => l.hostname !== location.hostname).forEach(el => el.addEventListener("click", clickExt)); function clickExt(e) { if (confirm("You're about to leave our website. Do you want to continue?")) { return; } else { e.preventDefault(); return false; } } </script> This is very basic but it will should get you started by launching a basic browser popup whenever an external link is clicked. This will give visitors the opportunity to change their mind before leaving the site:

With some additional HTML/JS, this could be improved by replacing the built-in browser popup with a custom one that includes the features that you need, for example:

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@otilia You'll need to resolve the error on the first line of your custom CSS panel first.

You can check the box to the left of each order and when you click MARK AS FULFILLED a box will appear like this:

Uncheck the box before clicking CONFIRM.
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When you upload a video directly to Squarespace (instead of using a third party video service like Vimeo) it will be encoded at 1080p and 360p. It is best to upload files with a resolution of 1080p and a bitrate of at least 3 Mbps. If the original video has a different resolution, for example 4K or 720p, it will be re-encoded into these formats before it is saved on Squarespace servers.
Squarespace decides which version (1080p or 360p) to display to a visitor, based on their device, browser, and internet connection. You cannot control which version is shown.
I hope this helps.