We'd be happy to help with that, Patrick!
When using the cooktop, each cooking zone can be switched on or off individually whenever you need it. As soon as the cooktop detects a compatible pot or pan, the selected zone will keep heating until you turn it off. For additional tips and recommendations, pages 23 and 24 of the user manual are a great resource.
Regarding the clock, you can choose to display the time in either a 12-hour or 24-hour format, whichever you prefer. There's also a Screen Saver option that you can turn on or off based on your preference. Instructions for these settings can be found on page 43 of the manual.
User manual:
https://downloadcenter.samsung.com/content/UM/202502/20250217164834977/O_01._IB_FULL__NE9100D_NSI6DB9300_EN.pdf
Hope this helps.
Khristine
Samsung Care