to change; to exchange; to convert; to renew; to throw a switch; to replace; to switch over
気持ちを切り替えて前に進もう。
Let's switch our mindset and move forward.
暖房から冷房に切り替えた。
I switched from heating to air conditioning.
会社は古いシステムを新しいものに切り替えている。
The company is switching from the old system to a new one.