With some newsgroups selected, you're now ready to start grabbing messages to read. With Outlook Express, you have two ways to proceed:
Online: Working online means you're connected to the news server. You can download message headers at any time, and highlighting a message downloads the message text immediately.
Offline: Working offline means that you connect briefly to get the available headers in a group. Then, while you're not connected, you examine the message Subject lines and mark those that you want to retrieve. You then connect once again and tell Outlook Express to download the marked messages.
In Outlook Express, you can connect to your news server at any time by selecting File | Connect ...