Example of an account file with 3 accounts for different platforms (not real data, just examples):

Account 1
Platform XenForo
Tab titles: "Common", "Create content", "Reply"

Account 2
Platform phpBB
Tab titles: "Login", "Post new content", "Content reply"

Account 3
Platform SMF
Tab titles: "Do login", "Tab 2", "Tab 3"


So the grid on the Poster screen will show:
Account 1
Account 2
Account 3

And the combo at the bottom cannot show the tab titles becaise they are all different.