grey box showing auto and menu with contrast 50% and brightness 70% appear on my computer quite often, what do I have to do to delete this symbol
tzevctv yezgy cygyg zeyfgyz eg
vgdsvh ghdbhbyhsdbdhvb hbdv hbhjvbhqsb
hgvygvyhvbyfazg cygyhudg ygc yycgdycf yGVYGGYG
GVH W<VHQVGH VHSGVCHJV CGVS egvgcvhqfdcvhfgychvbyhgv
ccgg
This is a Simple Dialog Demo.