I am a total noob with Linux of any kind.
Lately I have installed Kali on my Win10 computer (in a separate partition), and now I have the Dual Boot working, BUT......

At computer startup I get a screen with the boot options, where the default is Kali, with a timer for 5 seconds.

I want to change the default boot to Win10.
How do I do it (and pleae remember - I am totally new to Linux...