Hello ljos,
There are two parts in show control: sources and tasks.
Sources are used to trigger or start an action.
In an action you can set a trigger conditions. Like the trigger type and trigger value.
Tasks are used tell the unit to do something. Like pick a random number.
This will cause the source Randomizer to fire.
In you example the Randomizer will create a random number at a specified date and time.
Parameter 1 of the randomizer is the minimum value the randomizer will create.
Parameter 2 of the randomizer is the maximum value the randomizer will create.
However all task, feature and function combinations have there own parameters.
Which have a description above the input field.
Best regards,
Guido