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There are options to manipulate those using the key-combo 'Ctlr+Alt+right-mouse-click' or, in case of windows the little blue square top-left allows the same options.
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For a tad advanced users who don't mind some command-line magic, there's the 'eesh' shell specifically for e16.
Do a'eesh help all'
to see what's available. -
Then there's the menu: 'Enlightenment' -> 'Desktop' and 'Settings' where inside the latter there are options under the 'Desks' and 'Areas' buttons.
There's a tutorial on customizing E16 here with a section on the pager here: