In Domain Mapping, the source rows lay out all different domain values across all subtypes. In order for the preview rows underneath that mapping to show honestly, you would have to change the value in it's last iteration within the rows. For instance:
Here is an example of the layout if the source was a subtype field with domains A and B.
0 (A) - (None)
1(A) - (None)
0 (B) - (None)
1 (B) - (None)
If all of the values in source are 1, then mapping either 1(A) or 1(B) should do the same thing. The preview row, however, will not show the accurate mapping unless you map it to 1(B) due to a for loop that does not break.
In Domain Mapping, the source rows lay out all different domain values across all subtypes. In order for the preview rows underneath that mapping to show honestly, you would have to change the value in it's last iteration within the rows. For instance:
Here is an example of the layout if the source was a subtype field with domains A and B. 0 (A) - (None) 1(A) - (None) 0 (B) - (None) 1 (B) - (None)
If all of the values in source are 1, then mapping either 1(A) or 1(B) should do the same thing. The preview row, however, will not show the accurate mapping unless you map it to 1(B) due to a for loop that does not break.