ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Core Namespace / TextAndGraphicsElementsOptions Class / SetDefaultFont Method / SetDefaultFont(String) Method
The font family to set as the default
Example Version

SetDefaultFont(String) Method
Sets the application default font family name and style. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public void SetDefaultFont( 
   string familyName
)

Parameters

familyName
The font family to set as the default
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
font not found
Remarks
The default font style for the given font family will be assigned. Use SetDefaultFont(String,String) to set a specific font style.
If the input font family name does not exist an System.ArgumentException will be thrown
Example
Get/Set Default Font
//Must use QueuedTask.Run(...)
var def_font = SymbolFactory.Instance.DefaultFont;
System.Diagnostics.Debug.WriteLine($"{def_font.fontName}, styles: {def_font.styleName}");

//set default font - set through application options
//Must use QueuedTask
ApplicationOptions.TextAndGraphicsElementsOptions.SetDefaultFont("tahoma");
ApplicationOptions.TextAndGraphicsElementsOptions.SetDefaultFont("tahoma","bold");
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also