http://www.autoresponderpro.net/article-autoresponder/

How do you adjust the input size in html code?
I have set up an autoresponder at one of my sites, but i want to enlarge the input size of one of the boxes to accept large submission articles. Any suggestions?
I’m not following exactly how your site is set up. If you have set up a text area for text to be typed or pasted, here is the code:
Adjust the ROWS and COLS to match your need. Also, see if there is any scripting that limits the max length or size that needs to be adjusted.
Good luck!
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