private void btnRedo_Click(object sender, EventArgs e)
{
String[,] tooltips = imgRegion.ToolTips;
history.Redo(imgRegion.Layers[SELECTIONLAYER].Image, region, Settings.RedrawTerrainMap ? imgRegion.Layers[MAPLAYER].Image : null, imgRegion.Layers[BIOMELAYER].Image, ref tooltips, imgRegion.Layers[POPULATELAYER].Image, UpdateStatus);
imgRegion.ToolTips = tooltips;
imgRegion.Redraw();
}