如何在drupal 7中更改按钮的标题？

I installed the commerce backoffice module. In the store products list having a quick edit button, actually I need to change the Quick edit title of a button to Quick look, please help me on this.

Try hook_page_alter.

function my_modulename_page_alter(&$page) {
  //find your button in $page variable and change its text.
  }

You can use hook_form_alter to alter the text on the form button.