What namespace is VirtualPaperLayoutManager defined in?

VirtualPaperLayoutManager is in the IronPdf.Engines.Chrome namespace, shipped in IronPdf.dll. The trailing 1 in the URL IronPdf.Engines.Chrome.VirtualPaperLayoutManager1.html is docfx's generic arity decoration, not part of the class name; the real declaration is public class VirtualPaperLayoutManager . Application code reaches the concrete non-generic VirtualPaperLayoutManager through ChromePdfRenderOptions.PaperFit rather than this generic form.

What is the difference between VirtualPaperLayoutManager and VirtualPaperLayoutManager?

VirtualPaperLayoutManager is the generic-arity-1 form of the class. VirtualPaperLayoutManager (no type parameter) is the non-generic concrete form returned by ChromePdfRenderOptions.PaperFit. Both pages document the same five Use rendering methods with identical signatures, because both compile down to the same surface. The `1` suffix in the URL IronPdf.Engines.Chrome.VirtualPaperLayoutManager1.html is docfx's generic arity decoration. Application code in IronPDF C# accesses the non-generic concrete instance via renderer.RenderingOptions.PaperFit and never type-parameterizes the layout strategy directly.

Why does the page heading show a trailing 1 after the class name?

The `1` is the generic type parameter arity, not part of the class name. docfx 2.58 strips angle brackets in HTML page titles and replaces them with the parameter count. The real declaration is public class VirtualPaperLayoutManager . The same convention appears in the data-uid identifiers on the page, such as IronPdf.Engines.Chrome.VirtualPaperLayoutManager1.UseChromeDefaultRendering, where the 1 still represents the type-parameter count.

Can more than one PaperFit mode be active at the same time?

No. Only one mode may be selected per render. Each Use method on VirtualPaperLayoutManager overwrites the previous selection, the same as on the non-generic sibling. If UseResponsiveCssRendering is called and then UseContinuousFeedRendering is called on the same instance, the continuous feed mode wins. Pick one mode and configure it once before calling RenderHtmlAsPdf or RenderUrlAsPdf.

Class VirtualPaperLayoutManager1

Inheritance

System.Object

VirtualPaperLayoutManager1

Namespace: IronPdf.Engines.Chrome

Assembly: IronPdf.dll

Syntax

public class VirtualPaperLayoutManager1 : Object

Reach for VirtualPaperLayoutManager<T> to understand how the Chrome engine fits rendered HTML onto the configured paper through the layout strategy this generic form documents. This page is the generic-arity-1 form of that strategy class: the trailing 1 in the page filename and headings is docfx's generic-parameter arity suffix, mirrored in the data-uid IronPdf.Engines.Chrome.VirtualPaperLayoutManager1, and the real declaration is public class VirtualPaperLayoutManager<T>. It is the generic shape behind the concrete non-generic VirtualPaperLayoutManager returned by ChromePdfRenderOptions.PaperFit, which is where application code actually selects a layout mode. Real code rarely interacts with this generic form directly.

This page exists because the IronPDF assembly exposes a generic-arity-1 closure of the layout strategy that docfx renders as a separate type. The five method names and signatures match the non-generic sibling exactly, since both surfaces compile down to the same set of Use* calls. Production C# code accessing PaperFit lands on the non-generic concrete instance through renderer.RenderingOptions.PaperFit, so the canonical idiom is the same regardless of which page a search engine surfaces. Reach the generic form only when working against a closed type that explicitly type-parameterizes layout strategy, which is uncommon in standard IronPDF usage.

The method surface is identical to the non-generic sibling: UseChromeDefaultRendering() for browser-style print preview, UseResponsiveCssRendering(int ViewPortWidth = 1280) for layouts driven by a virtual viewport, UseScaledRendering(int ZoomPercentage = 100) for an extra zoom factor over the Chrome default, UseFitToPageRendering(int MinimumPixelWidth = 1) for scaling wide content down to a single sheet width, and UseContinuousFeedRendering(double width = 80, int margin = 5) for single-page output sized in millimeters. Only one mode may be active per render, because each Use* call overwrites the previous selection. Because the recommended call site for real applications is the non-generic concrete instance held by PaperFit, the viewport and zoom how-to documents these modes against that concrete type.

using IronPdf;
using IronPdf.Engines.Chrome;

ChromePdfRenderer renderer = new ChromePdfRenderer();

// Canonical idiom: reach the concrete non-generic strategy via PaperFit
// (the generic VirtualPaperLayoutManager<T> form on this page closes to it).
renderer.RenderingOptions.PaperFit.UseResponsiveCssRendering(1280);

// Alternatives (uncomment one; only the last call takes effect):
// renderer.RenderingOptions.PaperFit.UseChromeDefaultRendering();
// renderer.RenderingOptions.PaperFit.UseScaledRendering(120);
// renderer.RenderingOptions.PaperFit.UseFitToPageRendering(1024);
// renderer.RenderingOptions.PaperFit.UseContinuousFeedRendering(80, 5);

PdfDocument pdf = renderer.RenderUrlAsPdf("https://example.com");
pdf.SaveAs("layout-managed.pdf");

For non-default sheet dimensions used alongside PaperFit, see the custom paper size guide. The responsive CSS how-to pairs UseResponsiveCssRendering with CssMediaType for print-versus-screen control.

Methods

UseChromeDefaultRendering()

Declaration

public void UseChromeDefaultRendering()

UseContinuousFeedRendering(Double, Int32)

Declaration

public void UseContinuousFeedRendering(double width = 80, int margin = 5)

Parameters

Type	Name	Description
System.Double	width
System.Int32	margin

UseFitToPageRendering(Int32)

Declaration

public void UseFitToPageRendering(int MinimumPixelWidth = 1)

Parameters

Type	Name	Description
System.Int32	MinimumPixelWidth

UseResponsiveCssRendering(Int32)

Declaration

public void UseResponsiveCssRendering(int ViewPortWidth = 1280)

Parameters

Type	Name	Description
System.Int32	ViewPortWidth

UseScaledRendering(Int32)

Declaration

public void UseScaledRendering(int ZoomPercentage = 100)

Parameters

Type	Name	Description
System.Int32	ZoomPercentage