How do I disable hot key combinations

[Colin Law]

On Wed, 10 Oct 2018 at 22:57, Bret Busby <bret.busby at gmail.com> wrote:
>
> How do I disable what I believe are named hot key combinations?
>
> I am using UbuntuMATE linux 16.04.x, and, I can be typing text into a
> form, and then, a half hour or so, of text typed in, suddenly
> disappears and the screen hanges to show that something has happened,
> and I am not sure what has happened.

What application is the form running in?
I can't think of an application that expects me to type for half an
hour with no option to save along the way.

Colin