You can change the size and appearance of your files and folders by using the Views button located on the toolbar of every open folder.
Open the folder that you want to change.
Click a view or move the slider to change the appearance of your files and folders.
You can move the slider to a specific view (such as to the Details view), or fine-tune the icon size by moving the slider to any point between Small Icons and Extra Large Icons.
When using libraries, you can arrange your files and folders in different ways by using the Arrange by list, as well as by using the Views button. When you make a change using the Arrange by list, and then change the view using the Views button, you can go back to the default view by clicking Clear changes in the Arrange by list.