Participial adverbial clauses perform the same range of FSP functions within the communicative field of the superordinate clause as non-clausal and finite-clause adverbials. The FSP function of participial adjuncts is determined primarily by the FSP factors as given by Firbas (1992) for written texts: the context, semantics, and linear modification. Out of these, the employment of the factor of linear modification is constrained by processing pressure (due to the clausal form of the adverbial and the unexpressed subject in participial free adjuncts). The role of context is generally reduced in adverbials, as they are not typically context-dependent or independent in the same way as other (nominal) clause elements. The FSP factor prominent in adverbial clauses thus seems to be the semantic structure. Several secondary factors, or clues, can be traced here. The adverbial clause generally introduces more information into the superordinate clause than non-clausal adverbials, which marks it as more dynamic. Consequently, the thematic adverbial clause typically functions as the diatheme. If the information presented by the participial clause is quite specific or the adverbial clause is itself complex (this applies in particular to adverbial clauses with a finite-clause object), the end-placed adverbial clause functions as a rhematic element. The form of the adverbial (a nonfinite clause) may influence the distribution of CD in the superior communicative field in yet another way. Being itself homogeneous with regard to the distribution of CD, the participial clause may lead to the compacting effect, setting off the rheme of the superior field or assigning additional prominence to an adjacent thematic element, typically the subject of the superordinate clause.