Figure 1 shows an example in which the column width of the repeating container is specified as 15%, 25%, 20%, 20%, 20%.
For each item of the repeating container, open the model item detail definition dialog.
On the output control tab detail screen, specify "style> label width".Giving "%" gives a ratio.Excluding "%" will be a fixed value (pixel).
This setting is reflected not only on the detailed display screen but also on all new, copy, and update screens.
The repository key is presentation/displayitem/@labelwidth.