In the main window, you may feel the text is too small, as the classic profile uses Consolas 10 as the font and size. It's easy to change the font and colors, make the text bold or italic, and change the font size and style.

Go to Edit, then to Preferences, and select Font and Colors, as shown in the screenshot here:

Along the top, if you select Main window font then it will display a dialog box that will allow you to make changes to the font, as shown here:

Below the Main window font, you'll see defaults for the way Wireshark colorizes the text and background for active and inactive items along with marked and ignored packets. After that, you will see the defaults for the client and server text when you right-click on a packet and select Follow the Stream, as shown here:

The colors help identify whether the client or the server is talking. The default value for the client text, when you follow the stream, is red, but this value can be changed.

The last three samples listed refer to the display filters. The syntax checker within Wireshark checks the filter once you enter something in Display Filter. By default, a valid filter turns green, an invalid filter turns red, and a warning filter turns yellow. As with all the other choices, you can change this as well.

In Wireshark, we can indicate information on a particular packet or capture file in the form of comments, as we'll see in the next section.