When looking at the records window for individuals right click on a blank area and select
On the "configure columns" panel that appears select "<other>"
from the list on the left side. (it is at the bottom). Transfer this to the right hand
side using the > button.
In the "add column" panel that appears add the heading, say Spouse, and add
INDI.~SPOU>NAME in the expression line.
Use the up/down arrows to place the new column in your preferred position.