Double has two view formats: split screen and interlaced. Text files are viewed in text mode, and binary files are viewed in hex mode.
A "HiLite" feature is also included. "HiLite" highlights the differences between the two files to make them very noticeable. You can turn "HiLite" on or off at any time while viewing the two files.
You can view the same file twice, then move to another part of the file to see the differences between two parts of the same file. You can also view a single file.
A search mode option searches for differences between two files. This time-saving feature is especially useful when the files are very large.