Add navigation (next/previous) to pager

Hi,

Could anyone tell me how I can add pagination buttons to the pagination, instead of only the numbers? I know have

“1 2 3 4″

But I actually desire something like

“< Previous 1 2 3 4 Next >”

I use an alternative styling using functions .php based on this args array:

$args = array(
    'posts_per_page' => 2,
    's' => esc_html($keyword),
    'paged'=> $pagenumber,
    'post_type' => 'project'

    );

The pager is displayed by the following code, but i don’t know how to alter it:

echo $apiclass->ajax_pagination($arg['paged'],$query->max_num_pages, 2, $id);

The plugin Page Navi does not work because of the ajax.

https://www.ads-software.com/plugins/ajax-wp-query-search-filter/