Default [Q] lenovo idea tab s5000 f

can you help me with this :
I saw on other tablets -vonino orin hd - that on it launcher appears 5 icons instead of 3 usual like in this photo
it has 2 more icons of volume + and - .(this kind of tablet has not the volume buttons on the side)
how can I modify Lenovo launcher or where I can made this change
Attached Images
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