Hi Marcelo,
The email body textbox can be made larger through some simple customization. When you're editing the screen look for the Body textbox object. Click edit on this object and you should find Number of input lines within the advanced options. Hope this helps!
-Jason
Need more help? Ask us about Method consulting services
Jason Masina
Community Support Specialist
Method Integration Inc.
Toll Free: 1.888.925.6238
Local and overseas: 416.847.0400
Fax: 416.640.6027
E-mail: j.masina@methodintegration.com