How Would I Use The Return Key For phpbb BBCode

i use the return key in some of my custom bbcodes, is there a function that will do that
i use the bb button and it puts text in the input field
text
theres a return key function in the html replacement that acts as if the return key was used and goes to another line and adds more text
one button does this
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more text
can anyone help

See original post by tunescool