TextEdit
Add a hyperlink to a TextEdit document
08/23/2010
In TextEdit, to make any word or phrase an active HTML link, highlight the text then do Edit> Add Link and enter the URL in the "Link destination" field.
Enable autosave in TextEdit
07/29/2010
In TextEdit, to enable autosave to automatically save modified documents, do TextEdit> Preferences> Open and Save> Autosaving.
Transform selected text in TextEdit
06/10/2010
In TextEdit in Snow Leopard, select some text then do Edit> Transformations to make the selected text all upper case, all lower case, or all capitalized.
Convert a styled text document to plain text
05/29/2010
To convert a styled text document to plain text, removing any formatting, colors, images, etc., open it with TextEdit and do Format> Make Plain Text.
Embed a file into a TextEdit document
05/16/2010
In TextEdit in Snow Leopard, embed a file (another text file, an image, a spreadsheet, an application, etc.) into a document via File > Attach Files.
Select a vertical block of text in TextEdit
04/29/2010
In TextEdit, to select a vertical block of text (such as a column of words or numbers), press and hold the Option key then select the text.
Select all occurrences of a word found in TextEdit
04/06/2010
In TextEdit, to select every occurrence of a word found in a document, do a Find (Command-F), type the word, press the Control key and click "Select All".
Open and save Word-formatted docs with TextEdit
02/15/2010
Drag and drop a Word (.doc or .docx) file onto TextEdit to open it, without the need for Office. Then, use Save As in TextEdit to save back into Word format.