Visual guides or vertical rulers plays an important role from the perspective of code writing. It helps us to maintain specific length of code. Like for Python we have PEP8 standards where it has been mentioned that code length should be 79 characters. Such rulers help us to visually confirm that Python script contains the code with 79 characters length. In this video we will see that how to add such vertical rulers at specific length with specific color. We will also see how the language specific rulers can be added.