To customize key options: Tools -> Add-ons... -> Key -> Options...
Let's add to "Ctrl+E" in the list view. (open the selected item by an editor.)
Choose Tools -> Add-ons.
Push "Options..." of the key. You can search it with a left bottom input field and magnifying glass or Ctrl+F.
At first set the effective place of the key.
- All: It is effective anywhere.
- List: It is effective in the listview.
- Tree: It is effective in the treeview.
- Browser: It is effective in the address bar, tool bar or etc.
Choose an editor and press "Open".