I've started playing Stellaris for the first time and have integrated a few factions into my quickly growing empire. I've established sectors where there are colonies in close proximity, but any planets that more than a few hyperlane jumps away remain as frontier worlds.
These frontier worlds are situated right next to my sector's capital planet but due to hyperlane travel is technically four jumps away. Due to it's superficial proximity I'd like to add this planet to my existing sector, but I only see options to declare it as a new sector.
Is there a way to add distant planets to existing sectors?