ASP.NET MVC PDF Viewer Control
C#: how to load, display, generate, view, adjust PDF file in div, MVC partial view using asp.net pdf reader
How to click button to zoom-in and zoom-out PDF document views using asp.net mvc pdf viewer control
Adjust PDF page magnification in ASP.NET MVC PDF viewer, reader web controls
You can change the PDF page magnification by using buttons on toolbar View > Zoom
The Marquee Zoom button allows you to drag a rectangle around an area of the PDF page, which you
need to fill the viewing area.
Zoom In and Zoom out buttons increase or decrease the current page magnification.
The Zoom Value options changes the page view current magnification.
Actual Size displays the page at 100% magnification.
Fit Width adjusts the magnification so that the PDF fills the document pane horizontally.
Fit Height adjusts the magnification so that the PDF fills the document pane vertically.