What does stats show-legends display

Hello,

I have 1.6.5 HAProxy

I have stats show-legends setup, but no additional stat is seen on stats UI as documented?
Please suggest what am I missing?

Please give an example screenshot what does stats show-legends display

listen stats
bind *:8181
stats enable
stats uri /
stats realm Haproxy\ Statistics
stats auth cloud:cloud

backend cdp1
mode tcp
balance roundrobin

server app1 10.128.41.10:22 check
server app2 10.128.41.11:22 check
timeout server 2h

stats enable
stats show-legends
stats uri /admin?stats
stats refresh 3s

You’ll get a mouse over pop up, as shown below:

Best

Sascha