Keeping applications closed when unnecessary conserves system resources. It also keeps one's workspace simple and uncluttered, which helps to maintain one's focus. Therefore, it is usually preferred to *peek* into applications instead of opening them. This also helps avoid the awkward situation of downloading and thereby unintentionally leaking copyrighted material, which can result in copyright infringement and other legal liabilities. A great way to quickly peek file contents—whether a document, PDF, audio file, or movie—is through the quick look preview feature. Just press the space bar to open and preview the file easily by opening the [[Preview]] application. ![[quick look preview.mp4]]