What does the Gallery view tab use to determine graphics files?

The Gallery view tab in forensic tools like EnCase primarily utilizes file extensions to identify graphics files. File extensions are an integral part of a file's name that indicates the file type and format, allowing the software to display graphic files appropriately in the Gallery view.

When a file is created, the operating system typically assigns it a file extension that designates its format, such as .jpg, .png, or .gif for images. The Gallery view then checks these extensions to categorize and display the files accordingly. While file signatures (also known as magic numbers) are reliable means of identifying file formats, the Gallery view specifically prioritizes recognized file extensions for ease of use and quick access.

This focus on file extensions is significant because users often rely on this naming convention, which is widely understood and utilized across various operating systems. It simplifies the process of managing and reviewing graphic files in the forensic context. Other options like header or file signature, filename, or file size are not primary criteria used by the Gallery view tab for determining graphics files in this particular context.