1. Copy the set of code below.
// Change number of words displayed in the excerpt
add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );
function custom_excerpt_length( $length ) {
return 30;
}
2. Go to function.php and paste it there.
3. Note: The number of words in the code above is set at 30 words. You can change it to your preference.
4. Click Update File button.
Caution: Make sure you paste the code correctly in the function.php
It should be BEFORE this tag ?>
For more details on where to paste code to a php file.