It is equal to type "d" here:
1 new package to install. Overall download size: 1.0 MiB. Already cached: 0 B. After the operation, additional 6.7 MiB will be used. Continue? [y/n/v/...? shows all options] (y):
In such case zypper shows all in columns and becomes more informative:
So I just need to get the same "d" behaviour by default (for each zypper usage).