How can I regulate the steam output on a Braun CareStyle ironing system?

Braun CareStyle ironing systems offer different steaming options:

• Continuous Steam: It is activated by pressing the steam trigger below the iron handle. The steam rate is 2 times higher (compared to Braun TexStyle 7 steam iron).
  
• Precision steam shot: It is activated by pressing the button on the top of the handle to generate high pressure steam from the tip of the soleplate to help ironing the hard-to-reach areas like collars. (The feature is not included in low-end models.)
  
• Double trigger function: It is activated by clicking the steam trigger twice in quick succession within 1 second. There will be a continuous steam emission for a few seconds for tough ironing jobs like shirts.
  
• Vertical steaming: It is possible to steam hanging clothes or curtains by just pressing the steam trigger for very powerful steam emission.