1)

You can move the image editing toolbar outside from the step panel by clicking the arrow

2)

You can close it to move back to the step panel, or drag it accordingly

3)

There are different action tools, drawing tools and shape tools here

You can draw a rectangle, circle or line, you can draw using a brush and you can also undo or redo any action from here 

4)

The color palette will let you choose a color for highlighting an area

5)

The hide tool will blur the selected area

6)

This button will let you download the image file of this step in JFIF format

7)

You can set the line width for the highlighter between 1 to 25. You can crop the image and resize it if you have uploaded a larger image size