How to make Slicer not show option that have no value

[laurent_rio]

Hi i have data 

where table 1 show transfer list of employee to other country 
table 2 show the list of countries (master list country)

I connect country column in table 1 to table 2 

Now i use slicer country column from table 2, but then it will show the country that no employee has beenm transferred 

Is there any way to force slicer only show the countries that have employee transferred ? 

for example here table 1 only have country transfer Singapore,Brazil,China,Phil, USA but when i go to filter it still show whole country

Thanks

[amitchandak · Accepted solution]

@laurent_rio , put this measure number of job international rotation as a visual level filter and check for not blank.

This one is for two slicer , but true for one too -https://www.youtube.com/watch?v=cyOquvfhzNM