If From cursor is selected, matches will be found after the cursor until the end of the document.
If From the top is selected, all matches will be found from the beginning of the document.
If Selection only is selected, only the selection in the editor will be searched.
If current file is selected, the current file will be searched.
If All files is selected then all the editor files will be searched.
If case sensitive is checked then matches will be found only if the exact match is found not ignoring case.
If Whole words only is checked then the search will ignore text which is a substring of another word.
If Regular expressions is checked then regex search will be enabled.