So you want to generate additional lines into your report? Then in this case using println and comment will not work. You need to use KeywordLogger instead, for example:
import static com.kms.katalon.core.checkpoint.CheckpointFactory.fin…
In Katalon Studio, there is a setting for this. It's available in Project -> Settings -> Execution -> Default -> Web UI: Delay between actions.
It will behave the same like an option in Selenium IDE.