One way is found on page 35 of your manual. Download your manual from here
http://downloadcenter.samsung.com/conten鈥?/a>
How to change Samsung TL220 shutter speed?
Whenever I have a question/problem such as yours, I read the user's guide (aka %26quot;the manual%26quot;).
It is amazing just how much I always learn from that.
If that doesn't help (or if I'm interested in a product I don't own), I check the manufacturer's website.
They have descriptions and specs for their gadgets, often have user forums, and the decent manufacturers all let you download the manuals in electronic form (so losing the book is no longer a problem).
99% of the time that does the trick.
