Dell U2417HWi User Manual page 60

Then select
projecting images to your monitor.
NOTE: You will not be asked to verify subsequent connections for the same device.
Changing the Projection Mode
1
Click on the Dell Wireless Monitor Software.
2 Select your Projection Mode.
60
| Mirroring Your Device's Screen on the Monitor
on your monitor to accept connection, and your device will start
Wireless Monitor
Dell xxxx
PC only Duplicate
Device_xxxx
is trying to connect
Disconnect
Second screen only
Extend