How to get rid of the arrow on my navigation bar?

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I have EMUI 4.0.3 on my Huawei P8 Lite and there's a little arrow on my navigation bar and I don't know how to get rid of it... Any suggestions?

 

[anon(238680)]

Welcome to the forum. Have you contacted the xda folks as that is a custom ROM?

 

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This is stock OS. I think you thought that I have a custom rom because of Magisk. I installed Magisk manually.

 

[anon(238680)]

This is stock OS. I think you thought that I have a custom rom because of Magisk. I installed Magisk manually.

Yep, my bad. Thanks for the correction. Sorry then, don't have anything for that arrow.