Using pre_get_posts for taxonomy post count

by

I answered my own question I just implemented it wrong when testing it on my end (mis-typed the taxonomy).

This is correct:

// Change the number of posts that show up on the taxonomy template 
function custom_tax_post_count ( $query ) { 
  if (($query->is_tax(array('taxonomy_1', 'taxonomy_2')) ))
    $query->set( 'posts_per_page', '-1' ); 
} 
add_action( 'pre_get_posts', 'custom_tax_post_count' );