I have a field that I want hidden, but cannot see where to set the type. I've had a look at the view / modal and controller with no luck? Can someone please advise where to set this? I can't see class - controls in the css either? I really need some help as this is the last piece of the puzzle for my component. Can I set it amongst the following code for the input field?

In the form view I had

I researched and have changed to

which hides the corresponding field - this works on all fields in the view.

I do a variance of this so I don't lose hidden fields or have to alter them individually

If I have a load of hidden fields that I will be injecting values in from the URL (POST / GET) I create a FORM BRICK called hidden (alias)

I then just give the entire brick a class of hidden and add .hidden {display:none;) to my component style sheet

All hidden variables neatly package in their own (view)_hidden.php TMPL file

Thank you, I learn something new everyday, I'm sure there are more like me who are trying coding in a new language (me over 40) and struggle a little to ask the right question when searching or plain just don't understand what we are looking at. Anything new I learn as I go I will post as an answer. I'm sure if we all take the time to answer even the smallest question , even if only to point people in the right direction we all benefit.

So thanks Morgan, some of your advice on my previous questions has been invaluable. and I sincerely appreciate it.

Another way is far more easy : use the 'hidden' type (native Joomla)

In your XML form :
Otherwise, if you are using JDom, you can also use the following control : 'html.form.input.hidden'

Simple isn't it ?