private void RecordSegmentButton_Click(object sender, EventArgs e)
{
isSelectingRecordSegment = true;
isSelectingStartSegment = true;
blackBack.Visibility = Visibility.Visible;
oldButtonZIndex = Canvas.GetZIndex(timelineCanvas);
Canvas.SetZIndex(timelineCanvas, Canvas.GetZIndex(blackBack) + 1);
makeSelectionPrompt.Visibility = Visibility.Visible;
Canvas.SetZIndex(cancelActionCanvas, Canvas.GetZIndex(blackBack) + 1);
cancelActionCanvas.Visibility = Visibility.Visible;
}