ReoGrid supports zooming in and out of worksheets, both programmatically and via user interaction (mouse wheel, keyboard shortcuts).

Zoom Methods

sheet.ZoomIn();     // Increase by 10% (scale factor +0.1)
sheet.ZoomOut();    // Decrease by 10% (scale factor -0.1)
sheet.ZoomReset();  // Reset to 100% (scale factor = 1.0)

Set Scale Factor

Set a specific zoom level using the SetScale method or ScaleFactor property:

// Set scale to 200%
sheet.SetScale(2f);

// Or use the property
sheet.ScaleFactor = 2f;

Get Current Scale Factor

float currentScale = sheet.ScaleFactor;
Console.WriteLine($"Current zoom: {currentScale * 100}%");

Mouse Wheel Zoom

By default, holding Ctrl and using the mouse wheel zooms in/out:

• Ctrl + Scroll Up = Zoom In
• Ctrl + Scroll Down = Zoom Out

Disable Mouse Wheel Zoom

sheet.SetSettings(WorksheetSettings.Behavior_MouseWheelToZoom, false);

Keyboard Zoom

By default, Ctrl + Plus and Ctrl + Minus zoom in/out:

Disable Keyboard Zoom

sheet.SetSettings(WorksheetSettings.Behavior_ShortcutKeyToZoom, false);

Scaled Event

Listen for zoom changes:

sheet.Scaled += (s, e) =>
{
    Console.WriteLine($"Zoom changed to: {sheet.ScaleFactor * 100}%");
};

Related Topics

• Worksheet Settings — Behavior and view settings
• Hot Keys — Keyboard shortcuts