iPhone question?

#1
How do people take the screen shots on there iPhone of a conversation and then post them out on the sites like "damn you auto correct" and others. I have a conversation with my ex where she is refusing me time with my daughter and i need to print out the conversation so i have proof when ever we go back to court. Wish I had money for a lawyer, my daughter hates living with her and it kills me to not be able to do anything to help her. Some day KARMA will have it's day....I hope.
 
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