When you search in a Blogger blog, the default maximum items displayed is 20. However, if you click the Older Page link (in Contempo theme: More Posts) in the homepage, the limit is capped by the blog settings on Settings > Posts > Max posts shown on main page.
Let's take a look at the Older Page link:
https://xmlexpr.blogspot.com/search?updated-max=...&max-results=...Here we have 2 parameters:
updated-max: The published timestamp of the last post in current page, or in a Blog widget to be precise.
max-results: The limit of posts retrieved.
What we want is to set the max-results parameter on the homepage to 20. You can accomplish this by using JavaScript or by modifying the Blog widget code.
Using JavaScript is simpler. The following script replace any links containing max-results with max-results=20.
document.querySelectorAll('[href*="max-results="]').forEach(a => {
a.href = a.href.replace(/max-results=\d+/, 'max-results=20');
});It's simpler but you may need to add a few checks to make sure it only replace the Older Page link in the homepage.
There's this URL operators that we can use to replace the max-results param on the Older Page link. The syntax looks like this:
{URL} params {object}
or
params({URL}, {object})URL: A URL data.
object: key-value pair for URL parameters.
In our case, URL is data:olderPageUrl. Let's take a look on the original Contempo Light theme:
<b:includable id='nextPageLink'>
<a class='blog-pager-older-link flat-button ripple' expr:href='data:olderPageUrl'
expr:title='data:messages.morePosts'>
<data:messages.morePosts />
</a>
</b:includable>We modify it like so:
... expr:href='data:olderPageUrl params { max-results: 20 }' ...