From my understanding you are trying to apply one filter to multiple dimensions correct ?
If so I suggest having a look at this KB Article
Additionally, there is another thread that had a look into and gave a few ideas on parameters
Let me know if this helps.
Thank you for your answer.
Finally I had succeeded by creating a parameter and two calculated fields.
In the parameter I put all the selectable values, in the first calculated field I retrieve the value selected in parameter plus my two default values (1 & 2) , and in the second calculated field the value selected in parameter. I then put these two calculated fields in the filters ... and "voilà"
for information I used the same links that you sent me ;-) Thank you again !
Glad you got it sorted !