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Here I have gone to Date & Time, where I can select the correct location or timezone, and manually set the system time and date, or turn on NTP for network time control. You can select the location either by clicking on the map, or from the drop-down lists for region and city. When this screen is finished, I clicked 'Done' to return to the hub.
keyboard layout selection
This is the keyboard selection. The default layout is English/U.S. (of course). Click the "+" to add another layout, and select an existing layout and click "-" to remove it. You can leave multiple layouts selected, and change their order (precedence) with the arrow buttons. When the definition is correct, click 'Done' to return to the hub.
A comment about keyboards - I typically use a Swiss German, German, or US keyboard.
Most people will know about the difference between "QWERTY" and "QWERTZ" keyboards. But I have occasionally used French keyboards which have an "AZERTY" layout. I suspect that this is something the French are doing specifically to torment Americans, because it is guaranteed to have you pounding your head on the desk (or directly on the keyboard) within the first five minutes. Whatever the case, you can select the specific keyboard or multiple keyboards in this screen.
Target Disk Drive Selection
Now I am going into the most critical - and perhaps most controversial - area, the disk layout.
The obvious part of this screen is the selection of the target physical disk. The less obvious part is lurking under Full disk summary and options... at the bottom of the screen. If you don't want to install a bootloader at all (unusual, but not unheard of), click this label to get the screen where you can disable grub installation. Also, if you want full data encryption click the check box for that. I click 'Continue' to proceed.