// Get the current Zoom settings
ImGearZoomInfo igZoomInfo =
imGearPageView.Display.GetZoomInfo(imGearPageView);
// Change zoom to fixed to disable any current Fit modes.
igZoomInfo.Horizontal.Fixed = true;
igZoomInfo.Vertical.Fixed = true;
// Double the current zoom level.
igZoomInfo.Horizontal.Value *= 2;
igZoomInfo.Vertical.Value *= 2;
imGearPageView.Display.UpdateZoomFrom(igZoomInfo);
// Cause a redraw with the new zoom.
imGearPageView.Invalidate();