Hi Wolfgang, With MkIV blocks are hidden by default while MkII prints them, add \keepblocks[Block] to your document and the blocks will appear. Using \keepblocks worked thanks. Unfortunately, now the \reset command doesn't seem to work in mkiv (see attachment), but's ok in mkii. Glen ------- \defineblock[Block] \defineenumeration[Enum][location=left,text=Test] \setupblock[Block][before=\startEnum,after=\stopEnum] \keepblocks[Block] \starttext \section{Use} \useblocks[Block] \reset[Enum] \section{Define} \beginBlock jhdsa hdsfhj lh dsfjh jkhasdf sdakjhfsal sdkajhf kljsdh \endBlock \beginBlock jhdsa hdsfhj lh dsfjh jkhasdf sdakjhfsal sdkajhf kljsdh fhlkjsad kah dkjh akjhd flkjs lkjsad flkjh salkjhf asd \endBlock \stoptext