+ "Specify your query for Mairix using check boxes for activating fields.\n\n")
+ (widget-insert
+ (concat "Use ~word to match messages "
+ (propertize "not" 'face 'italic)
+ " containing the word)\n"
+ " substring= to match words containing the substring\n"
+ " substring=N to match words containing the substring, allowing\n"
+ " up to N errors(missing/extra/different letters)\n"
+ " ^substring= to match the substring at the beginning of a word.\n"))