VCF track can show variations in two possible ways:
The label above each variation indicates its type. For SNVs and short indels, alt and ref letters or sequences are shown.
You can see the details of a variation as follows:
Show Info - click here to display a pop-up with detailed information and a visualization of the variation’s results (refer to Working with Annotations for the details).
Show pair in split screen - click here to show the second breakpoint in split view. This option is only available if you clicked on a structural variation and its second breakpoint is not on the screen (e.g. long inversions or BNDs on other chromosome).