cd dir

Each buffer has associated with it a current working directory. This command sets that working directory to dir if it exists and the user has the correct permissions to read and search it.

The current working directory is used by commands that read or write files such as open, insert-file-text, insert-file-structure, save-as, save-selection-to-file, and eval-file.

In addition, the current working directory is used in system commands such as shell-command and grep.