How to add legend name and display at the pie chart

[#1]

Hi all

How can i add the legend name at pie chart ? i try to add new expression, =if(Count(DISTINCT[Carrier Name]=1),[Carrier Name],'Others')

but it still showing the figure only.  Did anyone encounter similar stituation? Mant thanks

[#2]

I can solve it. It is because the the space issue..

Wrong =if(Count(DISTINCT[Carrier Name]=1),[Carrier Name],'Others')

Correct =if(Count(DISTINCT [Carrier Name]=1),[Carrier Name],'Others')

Finally result will be