At the moment, it's only possible to apply custom display settings for a fields content at "display fields"->"cck_blocks". The title of the field ist rendered, as set in "display fields"->"basic".

It would be useful to have these settings sepperately for the basic node display and for the cck_blocks display. Sometimes, one wants to have different settings for the title in cck_block than in the basic settings. And even if the settins are the same for basic and cck_blocks, it's not very intuitive to change the behaviour of the title for cck_blocks in the basic tab.