Thanks Peter
I suppose that experienced web developer will be able to edit the unminimized version of the code and to add additional editors, if necessary.
OK, I understand that this is currently the only way to get an inline multiline editor in a grid
Maybe someone has already done this? Is there a place where community / 3rd party jqwidgets extensions are posted?
Adding custom editors in jqxGrid is not supported.
That’s fair, I would not expect you to help me write my own code and fix my mistakes 
However, is extending jqwidgets something that
a) you encourage e.g. you provide documentation, examples, tutorials, demos
b) you neither encourage nor discourage
c) you discourage e.g. it’s not intended, api changes will probably break extensions etc
To be honest, I don’t really want to start extending jqwidgets but I need to know what my options are.
Adding of text area editor is something which is unfortunately missing in the widget. I will create a work item about this.
Thankyou. I think a multiline editor would be very useful for a lot of developers using jqwidgets. If a timescale for release of a multiline editor becomes available, I’d be grateful if you could reply here to let me know.