An anchor link or "jump" link points to a specific point on a web page, instead of the default top of page. They are often used in tables of contents and FAQ lists.
A “Menu” is Drupal’s term for a group of links that help visitors navigate to the pages on a website. This guide describes how to edit a link in your site’s main menu.
Forcing links to open in a new window or tab is not recommended. The best-practice advice on this topic is to avoid opening newwindows/tabs without warning because:
There are often multiple ways to accomplish the same task in Drupal. This guide provides steps for one way of doing tasks related to content maintenance. You may find alternate methods that you prefer.