Full Text Search (Search=>Filter=>General)
Use this field to select waypoints that include the text you enter here in the full waypoint description. You may enter any text at all for the search: you do not need to use quotes. The search includes all text that is in the GPX file, including logs.
By default, the text you search for is displayed in bold red and highlighted in yellow in the offline HTML pages, which may be viewed in the split screen viewing area or in your default browser. Use the Highlight offline HTML check box to turn off this highlighting in the offline HTML pages.
For complicated searches you may want to acquaint yourself with the Regex (Regular Expression) option.