<span>Zenmap's topology tab displays a "Bubble Chart" that shows the relative size and connection type of all discovered IP hosts.
</span>A kind of chart which
shows three dimensional data is known as Bubble chart. It also can be seen as
the variation of scatter plot where bubbles replace the data points.
Create an adjustment layer and create a hue and saturation layer. You'll see sliders so adjust them to your liking. next select a layer mask and fill it will black. then select which areas you want to darken and use the wand tool. Apply a gradient mask if you want.