Kostas, I have tried this as well. Even though you can use multiple <help></help> tags which show up ok, I wasn't able to make them conditional. I also tried using the <filter></filter> which works for the data outputs but had no luck yet. It bails out with errors :( Alex Van: galaxy-dev-bounces@lists.bx.psu.edu [mailto:galaxy-dev-bounces@lists.bx.psu.edu] Namens Kostas Karasavvas Verzonden: donderdag 14 oktober 2010 17:31 Aan: Onderwerp: [galaxy-dev] quick question on building tool's interface... Hi all, When building a tool's interface would it be possible to have a different <help></help> tag for different <param type="select"> options of a 'conditional' tag? The options change the tool parameters significantly and having a big <help> tag that includes explanation of all parameters of all the options would be a bit confusing. Thank you, Kostas PS. I had some issues with an email alias. Sorry if you got duplicates!