Hi
I want to have much larger image on the product detail page.
So, I have changed the columns on the template „cms-block-gallery-buybox.html.twig“ from col-lg-6 / col-lg-6 to col-lg-9 / col-lg-3. And in Shopping Experiences changed „minimum height“ to 800px.
So far, so good 
But, the image does not change size (of cource 
it can not be that easy). Checking with the Web inspector I can see that the image is still at 454x454 pixel. And (part of) the source code is:
... sizes="(min-width: 1200px) 454px ... "
So, the 400x400 image is selected (I think). What (and where) do I need to change, to have the 800x800 image selected for the breakpoint at 1200?
The closest file I have found is „thumbnail.html.twig“ with this code block:
{% set breakpoint = {
xs: theme_config('breakpoint.xs'),
sm: theme_config('breakpoint.sm'),
md: theme_config('breakpoint.md'),
lg: theme_config('breakpoint.lg'),
xl: theme_config('breakpoint.xl')
} %}
But where are these breakpoints defined? I have looked into the default theme.json but nothing about breakpoints…
/ Magnus
