Hey @imarabinda
Sure thing I can show you how to show normal maps, etc using the Inspector.
Before we dive-in, in the future, please provide a playground with your question. That is the easiest way for people to help you learn. It’s also an expectation around here. 
Let’s start with this one:
With the scene loaded, find this button at the top:
That opens up the Inspector.
Next, in the inspector, expand Materials and select “YetiMat.” This selects the Yeti’s Material.
Next, if you scroll down in the general properties:
You’ll come to the “Channels” section.
If you select the little wrench icon on the far left of Bump, it will show you the Normal Map.
You can toggle “isolation” for any of the texture channels through the wrench icons next to each item.
The inspector is definitely your friend!
I hope this helps!