Web Crossing doesn't have a built-in way to use outline mode display by default but it can be implemented with WCTL.
Answer:
This level of customization requires learning something about the Web Crossing Template Language and modifying the folderListItem macro. Basically the user must remove the call to %% pathUrl %% which contains the default command code, construct a new URL with command code 230, and use that instead:
%% set pathLocation pathUrl.tail('@') %%
%% set newUrl urlBase & "230@" & certificate %%
%% set newUrl newUrl & "@" & pathLocation %%
%% new Url %%