How to return to the UEFI BIOS interfaces

[TTICT]

Hi everyone, I have a problem that everyone wants to help find a solution that is how to switch from Legacy BIOS to UEFI BIOS like when it came out.
Note: the term Legacy BIOS, UEFI BIOS are in my own words, may not be accurate, please understand and ignore.

 

I have a Dell Inspiron 7559 laptop, from the time I came in to the BIOS, I had a new interface as shown in Figure 1. Later on, I learned some ways on the network to transfer Legacy -> UEFI and format HDD & convert MRB - > GPT to install Windows 10. From then on, every time I re-enter the BIOS I noticed that the interface was switched to the blue Legacy BIOS.

 

I updated the BIOS to the latest version, Restore Default, [Enable] Secure Boot but still not feasible.

Ps: I come from Vietnam and apologize for my poor English