ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Layouts Namespace / LayoutView Class / ZoomTo100Percent Method
The amount of time to navigate the view to the new camera position. If null it uses the default navigation duration.
Example Version

ZoomTo100Percent Method
Zoom to the layout view to 100 percent. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public bool ZoomTo100Percent( 
   Nullable<TimeSpan> duration
)

Parameters

duration
The amount of time to navigate the view to the new camera position. If null it uses the default navigation duration.

Return Value

Returns true if the navigation is completed, false if it was interrupted by another view navigation.
Exceptions
ExceptionDescription
This method must be called within the lambda passed to QueuedTask.Run.
Example
LayoutView_ZoomTo_Percent
//Set the layout view to 100 percent.

//Process on worker thread
await QueuedTask.Run(() =>
{ 
  layoutView.ZoomTo100Percent();
});
LayoutView_LayoutFrameWorkExtender
//This sample checks to see if a layout project item already has an open application pane.  
//If it does, it checks if it is the active layout view, if not, it creates, activates and opens a new pane.

//Reference a layoutitem in a project by name
LayoutProjectItem layoutItem = Project.Current.GetItems<LayoutProjectItem>().FirstOrDefault(item => item.Name.Equals("Layout View"));

//Get the layout associated with the layoutitem
Layout lyt = await QueuedTask.Run(() => layoutItem.GetLayout());
      
//Iterate through each pane in the application and check to see if the layout is already open and if so, activate it
foreach (var pane in ProApp.Panes)
{
  var layoutPane = pane as ILayoutPane;
  if (layoutPane == null)  //if not a layout pane, continue to the next pane
    continue;
  if (layoutPane.LayoutView.Layout == lyt)  //if the layout pane does match the layout, activate it.
  {
    (layoutPane as Pane).Activate();
    layoutPane.Caption = "This is a test";
    System.Windows.MessageBox.Show(layoutPane.Caption);
    return;
  }
}
//Otherwise, create, open, and activate the layout if not already open
ILayoutPane newPane = await ProApp.Panes.CreateLayoutPaneAsync(lyt);

//Zoom to the full extent of the layout
await QueuedTask.Run(() => newPane.LayoutView.ZoomTo100Percent());
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also