Blue line while playing games in left side

[Pranav122002]

What is this Blue line ?

It comes while sometimes playing games in left side

That blue line has effect like four corner edge lighting effects 

Pl tell me what is this and why it comes 

?

See screenshot 

[Pranav122002]

Plz any1 tell me what is that blue line
And why it comes sometimes

[Parbat_]

Phone heat huva wo keh rha he fps performance down kiya he mobile ne wo dikha rha he aese....notification me game booster se auto management off kardo nhi aayega

[JithinAjith]

Edge lighting effect

[Pranav122002]

Arr its not edge lighting effects

[Pranav122002]

Its always in blue colour
No notifications come when that blue line comes

[Pranav122002]

It comes only while playing games

[Pranav122002]

A series don't have four corner edge lighting effects

[_Sayandeep_]

Yes it also comes in my device

[Pranav122002]

Have you install samsung game plugins app
?