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.
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.