diff --git a/How to/Handle Line Angle Constraints to Annotation Drawing/index.html b/How to/Handle Line Angle Constraints to Annotation Drawing/index.html
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+ EJ2 PDF Viewer
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diff --git a/How to/Handle Line Angle Constraints to Annotation Drawing/index.js b/How to/Handle Line Angle Constraints to Annotation Drawing/index.js
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+var pdfviewer = new ej.pdfviewer.PdfViewer({
+ documentPath: 'https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf',
+ resourceUrl: "https://cdn.syncfusion.com/ej2/31.1.17/dist/ej2-pdfviewer-lib",
+ // To enable the annotation drawing options
+ annotationDrawingOptions : {enableLineAngleConstraints : true, restrictLineAngleTo: 90}
+});
+ej.pdfviewer.PdfViewer.Inject(ej.pdfviewer.TextSelection, ej.pdfviewer.TextSearch, ej.pdfviewer.Print, ej.pdfviewer.Navigation, ej.pdfviewer.Toolbar,
+ ej.pdfviewer.Magnification, ej.pdfviewer.Annotation, ej.pdfviewer.FormDesigner, ej.pdfviewer.FormFields, ej.pdfviewer.PageOrganizer);
+ pdfviewer.appendTo('#PdfViewer');
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