Margin before first note

Good evening,
Is it possible to customize the default margin before the first note of the staff?
Thank you in advance.

There are few options you can change:

Engraving Options → Spacing Gaps
→ minimum gap after barline
→ ideal gap after barline
or
→ gap after initial clef
→ gap after key signature

Thank you very much.
Just I did not find the gap after key signature.