"Expand All" Option in Discover

There isn't an option for "All", but you can use click + shift to select a range of rows. So if you click the top row, go all the way down to the bottom, hold down the shift key, then left click again, you will select the entire range. Then you can use whatever breakdowns are available to you.

Thanks for the reply @dmooney.  I'm more concerned about more than 10 breakdowns since the limit is 10. 

just click into the breakdowns field and enter 100 or 1000?

Thank you @andreasdierl!  I didn't realize we could edit the Breakdown field by typing into it.  I thought we could only choose from the drop down menu.  Thank you!

One word of caution is that if you have a large data set with a lot of breakdowns or segements Discover will time out.   Sometime the report will run in Discover but when you try to schedule the report for export it will time out. There is no hard rule on the time out is what I have been told.