[NTG-context] Floats in Columnsets

Dear Sir Hagen, I know you are writing the complete manual for the columnsets, nonetheless I dare to bother you in advance. What are options for telling floats to what column, line and page they should go? I hade some examples from you, but I lost it when my harddisc crashed. Can you help me? Many thanks and greetings, Michal Kvasnicka