cant see the jumping lines when recording on cubase 12
Hi there and welcome to the forums!
What are “jumping lines”?
What flavor of Cubase are you using? Pro, Artist, etc…
What OS are you on?
What audio interface are you using?
Are all your software up to date? Including drivers and OS.
Can you share a screenshot to better shed light on what the issue is?
The more information you can provide, the easier it is for a fellow user to assist. 
I think they are called waves
I am using Cubase Pro 12
Windows 10
Behringer U-Phoria UM2
Can anyone help me
I am using Cubase 12 Pro with Behringer UM2 interface.
The interface is working as I can hear sound from the headphone that I speak in the mic when both connected to the interface.
The interface is getting power from the PC.
But Cubase doesn’t get sound from my interface.
What do I need to do to get this work.
It might be I didn’t make the right settings on Cubase but maybe I need to do something on the Behringer interface (I already downloaded the drivers for the interface)’
Kindly start to read the manual first, starting at page 15: