Hi Vladimir, I created a workbook similar to the one you described and it is behaving the way you want it to. (See attached.) The first time through I got the 'ALL' label, but after that it changed to 'None'. So I'm not sure what's going on in your particular workbook. If you post a packaged workbook I'll take a look.
BTW, I thought this was going to take a calculated field to accomplish, but it didn't, which is really pretty cool. There is one little strange behavior regarding the tool tips. I blanked the tool tip so it wouldn't get in the way of clicking, and this works fine. But as soon as you click a course the tool tip pops up. Not the behavior I wanted or expected. I'll send a note about this to support.
Dynamic Title.twbx.zip 9.7 KB
- Go to Dashboard -> Actions (or Worksheet -> Actions
- Select your filter action and edit.
- Change the option on the middle section, right side for "Clearing the selection will" from the default value of
"Show all values" to "Exclude all values."
That should do the trick.