On 2018-10-11 08:06, John Kitchin writes: > Do you mean interactively? With org-babel-tangle you can: > > With one universal prefix argument, only tangle the block at point. > > When two universal prefix arguments, only tangle blocks for the > tangle file of the block at point. Thank you! I looked at the manual but forgot to look at the function's documentation. Now I just need to find a way to specify the syntax for comments in the headers, and I'm all set. Alan -- OpenPGP Key ID : 040D0A3B4ED2E5C7 Monthly Athmospheric CO₂, Mauna Loa Obs. 2018-09: 405.51, 2017-09: 403.37