You will need to add your repository to Cornerstone before you can check out a working copy.
You can also click the Check Out button in the toolbar:
The check out sheet also contains a set of more advanced options:
Use the Format field to select whether the working copy format used is 1.4, 1.5 or 1.6.
This field defaults to 1.4 on Mac OS X 10.5 Leopard and 1.6 on Mac OS X 10.6 Snow Leopard for maximum compatibility with the version of Subversion pre-installed with Mac OS X.
The 1.6 format must be used when accessing a 1.6-format repository using the
The check out depth may be selected using the Depth field.
For 1.4 working copies the depth popup menu is limited to All files and folders at all levels (i.e. recursive) or Immediate files only (i.e. non-recursive.
All standard check out depths are available when checking out a 1.5 or newer format working copy.
If you encounter the error message Unable to contact repository at <server> when checking out a project even though the check out process appeared to complete successfully, check that repositories referenced by
svn:externals can be reached and that the URLs are correct.
This error is particularly likely if you are using a local repository and then attempt to check out a project with external references to a public repository on the Internet when you do not have Internet access.