Hi. Please help to create a subpanel within the opportunities module that is visible as long as you select from a drop-down list one of the options and enable or make visible the subpanel which must contain several fields that only belong to the selected option on the list.
By favos someone to help me by showing an example if possible graphically how to do something like that.
This might help you achieve part of your requirement:
http://urdhva-tech.com/blogs/add-custom-subpanel-in-accounts-module
but then you will have to add some logic to customize the view and make it react to the dropdown, and change the subpanel. This is not a very simple requirement you have, you will have to search several solutions and piece them together.
Found a similar sample here:
https://suitecrm.com/suitecrm/forum/suitecrm-7-0-discussion/11050-display-subpanel-based-on-field