Customize appearance

Style the floating Notify me button, word and style the sign-up form, and where each is edited.

Appearance has three editors. Each Customize button opens one full screen; changes are saved with the save bar at the top.

Editor	What it controls
Notify me button	The floating button on the edge of product pages.
Sign-up form	The form shoppers fill in — wording, colours, channels and custom fields.
Notifications	The messages shoppers receive. See Message templates.

The Notifylyst Restock Button block that sits in your product page is styled in the Shopify theme editor, in the block’s own settings — not here. See Storefront widget.

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Notify me button

The floating button: a tab fixed to the left or right edge of product pages, shown only while the selected variant is sold out. A live preview sits next to the settings.

Setting	Default	Allowed
Enable floating button	Off	On / off
Button caption	NOTIFY ME WHEN AVAILABLE	1–60 characters
Font size	16	10–32
Text orientation	Vertical	Vertical / Horizontal
Button position	Left	Left / Right
Vertical offset (top %)	50	0–100
Background color / Text color / Border color	#000000 / #FFFFFF / #000000	Hex colours
Border radius	3	0–50
Border size	1	0–10

A value outside the allowed range shows its error next to the field (for example Font size must be between 10 and 32.) and nothing is saved. Button styling depends on your plan (Button Customization).

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Sign-up form

Three tabs, plus a language menu if your store has more than one language. The live preview on the right shows the form as a shopper sees it, including the error and success messages.

Labels

Every piece of text on the form, per language:

• Headline (NOTIFY ME WHEN AVAILABLE) and Body copy (We’ll notify you when available.)
• the tab names for Email, SMS, Web push and WhatsApp, and their field placeholders
• the button text (Notify me) and the footer (We don’t share your information with others.)
• the messages: invalid email, already registered, and the confirmation (Your notification has been registered.)
• Enable quantity required field — on by default; off hides Quantity required and every sign-up asks for 1 unit.

Styles

Colours, fonts and the layout of the form — with or without the product image column — and the Notify me button’s colours.

Settings

Setting	What it does
Default channel	Which channel tab is open first.
Show product image in widget	Shows the product image beside the form. Hidden on phones.
Hide duplicated variants with the same SKU	Lists variants that share a SKU once in the variant picker.

Which channel tabs appear isn’t set here: the form shows a tab for each channel that is on in Settings → Channels. The variant picker only ever lists sold-out variants.

Custom fields — extra questions such as size, colour or a date they need it by — are in the same editor: Sign-up form fields.

Switching language with unsaved changes asks Save changes before switching language? Each language is saved separately. Editing other languages depends on your plan (Multi-Language).

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Limits

The whole form, in every language, must fit in 120,000 bytes — Shopify’s limit for the data the storefront reads. Past it, nothing is saved: Nothing was saved: the form is X KB, over Shopify’s 117 KB limit… If Shopify can’t store it, you see Could not save to Shopify. Nothing was stored… — try again.

Sign-up form fields

Next: ask shoppers extra questions.

Message templates

The third editor: what shoppers receive.