Hi, I assume you mean to group the parameters visually. What I have seen people doing is adding HTML code to the value of the label attribute of a <param> tag set, like ending the label with e.g. "<br/><hr>". Otherwise, if the two groups of parameters are mutually exclusive, you can use the <conditional> tag set. cheers, Joachim Message: 10 Date: Sat, 13 Oct 2012 12:07:03 -0300 From: Alfredo Guilherme Silva Souza<alfredo.bioinformatics@gmail.com> To:galaxy-dev@lists.bx.psu.edu Subject: [galaxy-dev] Group parameters Message-ID: <CAL39R3o+JupW225QZ7q4mqf8wMX3MbsmjtnLzA2XqDis5U+ZCg@mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" Hello I'm needing some grouping parameters into a tool that I'm developing, so I did not find any answers in the wiki galaxy. Attached is a picture with the example of the way that the parameters are in my tool currently, and the manner in which I need to leave. Thank you. -- Joachim Jacob, PhD Rijvisschestraat 120, 9052 Zwijnaarde Tel: +32 9 244.66.34 Bioinformatics Training and Services (BITS) http://www.bits.vib.be @bitsatvib