If auto validation is enabled in the service properties of the service details, the Designer constantly compiles and validates the service implementation.

You can trigger a validation run (compilation) manually via icon in the Controls panel, e.g. if

• the auto validation is disabled
• you have just cleared the compiler cache.

After clicking this button, the Validation panel opens (if it is not already open). A spinner is displayed during the validation. When the validation is finished, the validation results appear.