function PageWordBoxes: TPdfWordBoxes;
TPdfWordBoxes詞框會依空白字元、定位字元、換行字元與 NBSP 字元切分頁面文字
元件方法也會將 FPDFText_GetCharBox 矩形聯集為每個詞的單一頁面空間 TPdfRectangle
var Words: TPdfWordBoxes;
Rects: TPdfRectangles;
begin
Words := PdfView1.PageWordBoxes;
if Length(Words) > 0 then
begin
SetLength(Rects, 1);
Rects[0] := Words[0].Rect;
PdfView1.SetReadingHighlight(Rects, Words[0].Page);
end;
end;