I have received one shape file from a friend, who has a lot of features and attributes. However, it is within a single shapefile. So, it is difficult to me to recognise their features, since QGIS is only displayed one colour.
There is actually a way to display multiple colours of features although you have a single shape file. You can change the styles of the shape file in the layer properties. Double click the layer and select style. Select Categorized style and choose a field you want to visualize. Remember to classify your values before leaving the dialogue.