Draft:
A downloadable client offers the same functionality as the web client. However, most downloadable clients offer more than the basic posting functionality, sometimes extending even beyond the options listed on the web client.
Such features may include downloading entries, drafts of entries, friends list tracking, mass-deleting entries, mass-editing the security of entries, removal of misencoded characters, signatures, and substituting text or images in lj user tags.
Not every client will have these capabilities; you can usually read the client's journal for specific details