In short, the folders on Windows 10 and previous editions is optimized for either one of the below templates.So when you want to personalize the contents of a folder, by default, File Explorer renders you 5 kinds of templates. What kind of Folder do you want to Customize?When you open folders with a particular, such as pictures or videos – you notice that the contents of those folders appear slightly different from other folders. For example, a folder containing songs shows its content in Details with columns like Name and Title.Whereas a folder keeping pictures shows its contents in large thumbnails.The operating system itself identifies what type of files are there in a folder and thus assigns the proper template. The first section is What kind of folder do you want?, second is Folder pictures and the last one is Folder icons.Now, let us go along with each section of Customize tab individually.