The dialog can be accessed by pressing CTRL + SHIFT + F or by clicking Menubar -> Tools -> Find Text.
Allows search all open windows for matched text.
Double-clicking a match result, pressing Enter or clicking the View button will focus the window and highlight the matched line.
Pressing F5 will run the search again.
Searches only windows matching the specified window name.
If checked, searches for case-sensitive match.
If checked, searches using a regular expression pattern.
If checked, searches all open server windows.
If checked, searches all open channel windows.
If checked, searches all open private windows.
If checked, searches all open @custom windows.