In the Historical Analysis Page in Section 1 you can chart either historical CDS spreads (i.e., the market value) or upfront fees, whichever is relevant, for the following underlyings:
Single name
Index
Tranche
Once you have defined the underlying type in the Underlying column, i.e., if it is a single name, index or tranche, you then define its specifics in the rest of the fields that appear.