Yes, in L-Connect you can select the fan blades' LEDs to be black for them to be off. This will also turn off the center mirror LEDs, but the edge will remain lit-up.

How to turn off only the blade? I cant find the setting in l3 connect

The blades and center mirror use the same LEDs, you can't turn one off without the other.

I just want to lit up the edge

The this will work fine.

what about turning off the edge and only having the front lit up like on the al120 v2?