This is how I did it,
Menu Tools → Options on the Environment → Keyboard window
One can alter the default shortcuts following the below steps
- Select Edit.CommentSelection in the listbox
- Click on "Remove" button
- Select "Text Editor" option in the dropdown under "Use new shortcut in:"
- Press your own shortcut in the textbox under "Press shortcut keys:"
Example: Pressing Ctrl+E and then C will give you Ctrl+E, C
- Click on "Assign" button
- Repeat the same for Edit.UnCommentSelection (Ctrl+E, U)