ibus-table-latex trigger keybinding (or just documentation in general)

I’ve installed the ibus-table-latex package via APT and it works fine. However, I don’t see a way to re-bind (or disable) some of the triggers (backslash \, _, ^) that open the “candidate list”. In particular, I’d like to get rid of ^ and _ doing anything special.

In the input method setup, I’ve found this “Key bindings” page:

but these triggers are nowhere in that list.

More generally (but perhaps this warrants a separate question), is there any documentation for ibus-table-latex that would explain how or whether these can be changed? The only things I’ve found are

• The ibus-table-others GitHub page
• A short sentence on the IBus Wikipedia page
• The “About” button gives this link (there’s also this one with identical content), which is devoid of any information