I'm working on Sharepoint 2013 with Nintex Workflow 220.127.116.11
I would like to use a site workflow with a custom start Nintex form.
However I do not have the option to customize this form in Workflow parameters
List of feature options installed:
I tried to restart the NintexFormsWorkflowSite feature but it did not work
that looks a bit strange. Not only the form settings option is missing but also help, variables and so on. You should see various icons in that screen too, like here:
I would check the following to see if everything is set up correctly:
Does everything look good in your environment?
try to open configuration dialog several times, sometimes it happens it doesn't initialize correctly.
can you run designer and configuration dialog with developer console open? can you see any errors there?