# Preview and test As you are working on the content, you can use the Writerside Preview tool window to preview any topic. For more information, see [Preview topics](preview-topics.html). Writerside uses the built-in web server to serve the help pages. Click  Open in Browser in the Writerside Preview tool window to open the current topic in a web browser. You can actually preview your whole help this way: navigate to any topic, click any link, and even search for any keywords. Procedure: Share preview link * In the Writerside Preview tool window, click  Copy Preview Link to copy the link to the topic preview. Here is an example: ``` http://localhost:63335/Writerside+Help+Sources/preview/preview-build-and-publish.html ``` If you change `localhost` to the IP address of your computer, you will be able to share this link with other users who have access to your IP address. However, make sure that the built-in web server [accepts external connections](#enable_external_connections). If you do not have a publicly accessible IP address, you can use your private network IP address and share the built help with others in your network. You can find your private IP using the `ipconfig` command on Windows or the `ifconfig` command on macOS and most Linux distributions. Look for entries with `IPv4` and `inet`. Alternatively, you can go to your network connection settings details. Procedure: Enable external connections to built-in web server 1. Press `Ctrl+Alt+S` (Windows), `⌘ Comma` (macOS), `⌘ Comma` (IntelliJ IDEA Classic (macOS)), `⌘ Comma` (macOS System Shortcuts), `Ctrl+Alt+S` (XWin), `Ctrl+Alt+S` (GNOME), `Ctrl+Alt+S` (KDE), `Ctrl+Alt+S` (Emacs), `Ctrl+Alt+S` (Sublime Text), `⌘ Comma` (Sublime Text (macOS)), `Ctrl+Alt+S` (NetBeans), `Ctrl+Alt+S` (Visual Studio), `⌘ Comma` (Visual Studio (macOS)), `Ctrl+Alt+S` (Eclipse), `⌘ Comma` (Eclipse (macOS)) to open the settings and select `Build, Execution, Deployment | Debugger`. 2. Under Built-in Server, select Can accept external connections. > **Tip:** > If the option is not available, select a port number smaller than the default 63342.