You do need to be zoomed in enough in order to read the values. See top row in example:

https://xenabrowser.net/?bookmark=94035efd87666dab5467547e897071f0
The segments behind this are:
TCGA-B6-A1KC-01 987221 80917016 0.3515
TCGA-B6-A1KC-01 987221 48403410 0.3625
chromosome 17