Country codes:
Short
Long

Variable groups:
Display one at a time.
Show all groups together.

Variable availability information:
Display details.
Summarize.

Variables that are not available for the selected samples:
Do not display.
Display.

Variable display order
IPUMS default.
Sort by number of samples.
Sort alphabetically.

Ordering of sample columns within each country:
Chronological.
Reverse chronological.