Change the amount of posts displayed at wordpress manage page
only 15 posts will be displayed by default when try to manage posts at wordpress, sometimes there is a need to see more posts for bulk modification, following is a way:
go to the post.php in the folder of wp-admin/includes, and find the code:
wp(“post_type=post&what_to_show=posts$post_status_q&posts_per_page=15
&order=$order&orderby=$orderby”);
change the 15 to the desired number in posts_per_page=15.