There are a number of preferences you can set. Simply select the Figure 11.6, “The preferences dialog box”, with the “User Interface” page as default. On the left side is a tree where you can select the page to be shown.→ ( → on macOS) and Wireshark will pop up the Preferences dialog box as shown in
Wireshark supports quite a few protocols, which is reflected in the long list of entries in the “Protocols” pane. You can jump to the preferences for a specific protocol by expanding “Protocols” and quickly typing the first few letters of the protocol name.
You can search for a preference by typing text into the “Search” entry. You can also pass preference names to Wireshark and TShark on the command line. For example, the gui.prepend_window_title can be used to differentiate between different instances of Wireshark:
$ wireshark -o "gui.prepend_window_title:Internal Network" & $ wireshark -o "gui.prepend_window_title:External Network" &