[NTG-context] place figures at the end of document

Hi, Is there a way in ConTeXt to place figures (and other floats) at the very end of the document? More specifically I would like to keep on having to placefigure code at the relevant place in the text where I would normally typeset with the option [here], but sometimes readers want all figures moved to the end of the document and it would be handy if this could be done by changing a keyword. thanks, Peter