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g(note for doco - check whether PayPal Express CC will be there in the end)

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Navigate to Content → Pages & Templates.

Use the Search tool to find the Product Detail template.
Click Edit.

Find the Product Purchase Details Widget and click Edit.
Scroll down to PayPal Express Buttons Options and
Click the Braintree tab.
Image Added
To change the styling of the PayPal Express Button Options, click Edit.

Layout
check what is horizontal?
Height
Vertical (default)
Horizontal
Colour
Gold (default)
Other colours: blue, silver, white, black
Shape
Rectangular
Rectangle (default)
Pill Image Modified
Label
PayPal (default) Image Modified
Checkout Image Modified
Buy Now Image Modified
Pay Image Modified

The To change the styling of the text and style of the Pay in 4 messaging, click Edit. It can be customised from the default: Find PayPal Later Messaging Options and click Edit.
Message layout
data-pp-style-layout
Default: text

Flex - banner
Style Colour
data-pp-style-colour
Background colour of banner when style is flex (banner)
Default: blue
Style Ratio
data-pp-style-ratio
Shape and size of banner when style is flex (banner)
Default: 1x1
Logo position
data-pp-style-logo-position
Default: Left
Other positions: Right, Top
Logo type
data-pp-style-logo-type
Default: Primary
Other types: Alternative, None
Text colour
data-pp-style-text-color
Black (default)
Others: white, monochrome, greyscale
Text size
data-pp-style-text-size
Default: 12
Text align
data-pp-style-text-align
Default: Left
Options: centre, right

To hide the PayPal