i have a month parameter that I have a user that also wants to be able to have select all. can this be done and how.

Hi

this is what we get when we try to open the workbook

also see https://public.tableau.com/profile/jim.dehner#!/vizhome/BuildDBpresentationupload/TitleSlide

the tab marked Simple parameter will show you how to incorporate All into a a parameter list

there is a recording of that session at - see session #5

https://www.youtube.com/playlist?list=PL_qx68DwhYA_-2lTeTpzvb7abRVy_Ufss -

Jim