Spring Tool Suite change key binding autocompletion

Question

How do I change the keybinding for code autocompletion? Ctrl+Space is just horrible. I would like to have Alt+Space. But under Window->Preferences->General->Keys->Content Assist I can not choose Alt+Space.

Answer 1

1. Go to Window-> Preferences -> General -> Keys and type content assist.
2. Copy this text -> Alt+Space.
3. Right click on Binding text field.
4. Paste.
5. Apply, OK.
6. Enjoy.