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We find TextDiff very useful when we write code and also to see how text documents have changed over time. Unlike most other diff text products, our software can leave out unchanged lines and paragraphs making it very easy to see just the differences. It can compare any type of text document, via copy-n-paste to its two text windows. It also supports drag-n-drop of plain text, rich text and Microsoft Word documents. Note that it will only compare the plain text part of RTF and Word documents.
One of TextDiff's most powerful features is its ability to omit unchanged text in its difference report. This allows you to see all the differences very quickly, with the option of adding a few unchanged lines on either side for context.
To see a few lines of unchanged text around each difference, select Show only identical paragraphs near differences. The Options dialog allows the user to specify the amount of Context. The default is set at four.
To hide all unchanged text, except for text moved up or down in the document, select Don't show identical, unmoved paragraphs.
To hide all unchanged text, including even lines of text moved about in the document, select Don't show any identical paragraphs.
After you have selected a pair of text files for comparison and pressed the Compare button or double-clicked an entry on the Compare Directories dialog, the differences will be displayed in either a pair of windows or a composite one.
A useful tip is that if you wish to increase the text size used to display the differences, press the Ctrl and + keys simultaneously.
To decrease the text size, press Ctrl and - simultaneously.
To return the text to its default size press Ctrl and 0 (numeric zero).
You can also right-click on the window and bring up a Print dialog.
