Plot browser: where is property editor lineseries

I am plotting step response of 7 transfer function in matlab R2016b. I want to select each of them individually. When I open plot browser it shows only

 Axes(no title)

It does not provide option to select individual plots. Like ----g1 ----g2 How should i do it. I want to select individual plots and change their properties like font color,marker etc

In other words, I have made a step response of 7 transfer function. Where can I find the property editor -lineseries option. When I click on graph, I get property editor- waveform option

[Adam]

If you keep the handles of the plotted objects you can just edit these.

[Rakesh Jain]

I did this. Still not able to get

sys1 = tf([1],[1 3 2])
h1=stepplot(sys1)
hold on
sys2 = tf([1.1],[1.1 3.1 2.2])
h2 = stepplot(sys2)

What shall I do ?