Set Analysis to filter dimension values

[MH376]

How can I filter the dimension values using set analysis in QSense? For eg: Size dimension has ('XL','L','M','S','XS')

I want to filter values for size dimension so that it only displays  L, M and S

Size

L

M

S

[menta]

SUM( {<Size={L,M,S}>} Value)

[MH376]

By using Sum i think it will change the column to measure. Is there a way to display as a Dimension only?

[menta]

You can use If

If(Size='L' or Size='M' or Size='S',Size)

or

if you want the set analysis but I suggest use the If

Aggr(Only( {<Size={L,M,S}>} Size),Size)