Ipad Smart Keyboard Ctrl-Enter can not run selected cells

Ipad Smart Keyboard Ctrl-Enter can not run selected cells.
Also I want to change ctrl-enter to other keys,in keyboard shortcuts setting , I just found command mode edit button , can not found edit mode edit button .
In docs , I found this code can modify run-cell setting , but just affect current ipynb .
`%%javascript
Jupyter.keyboard_manager.edit_shortcuts.add_shortcut('alt-enter', 'jupyter-notebook:run-cell');`

So，how to permanent modify Edit mode keyboard shortcuts?
thanks.

Start with the Jupyter keyboard shortcut settings and the `Jupyter.keyboard_manager.edit_shortcuts.add_shortcut` entry point shown in the issue. Trace how edit-mode shortcuts are stored and applied, then verify that Ctrl-Enter runs selected cells on an iPad Smart Keyboard and that an alternate edit-mode shortcut persists beyond the current notebook.

Written by the indexing model from the issue text.