1)

Click on "Add Step"

2)

Select "Inline Step"

3)

You are in Capture mode, select an element to open creator panel

4)

Click on "Step Description"

5)

Click inside "Step Description" box

6)

Click on image icon 

7)

A pop-up window will open. 

Now you need to select an image, that you want to add in your step 

8)

After selecting an image, click on "Open"

9)

Image has been successfully added in your stepĀ 

10)

Click on "Save"