Think I'd found the relevant bit in the manual...
"Then tap Record , and tap the attribute button of where you wish this palette to be stored. For example: Record
Colour . In the Record Options window that opens on the external monitor, you can manually add other attributes
into the palette. To open the Record Options window on the internal touchscreen, press and hold Record, and then tap
the attribute key. To add the other required attributes, disable SmartTag, so it has a blue stripe, rather than red, and
then use the attribute filters along the bottom of the Record Options. To add position in for example, double tap
Position , so that it has a green stripe. Then type the palette number followed by enter, to record. You will notice this
palette is now annotated with the attribute letters of the stored attributes."
So if I record into a shape pallette, it will only record the parameters that fall under the shape category, even with smarttag on.