When you're talking about using the iron, do we need to make the distinction between "ironing" (iron in motion) and "pressing" (iron held in place)?

This is simple. When you're discussing sewing, ironing ALWAYS means pressing. The other is done when you're doing laundry.

Btw, as a side note, if you're buying needles for your sewing machine, don't use Singer sewing machine needles unless your sewing machine is either a) an older Singer, or b) and older machine that was made by Singer. REGARDLESS of what the packaging says!!!!

Why? Singer sewing machine needles are a mm (millimetre) longer than other brands. While this is perfect for Singer machines, this extra length can interfere with other brand sewing machines' shuttle timing. This makes crappy stitches, skipped stitches, bad lower tension, etc.

I highly recommend Organ brand or Schmetz brand sewing machine needles. Newer Singer's are made to work with these brands.