You can use the nrf5sdk-tools settings (or settings) command to generate and display a bootloader settings page.
A Device Firmware Update (DFU) bootloader requires a bootloader settings page that contains information about the current DFU process. In addition, it can contain details about the installed application and the firmware version.
Tip
For more information about the bootloader settings page in the nRF5 SDK, see the Bootloader settings page page.