I'm designing an online form that includes selection of options from combo boxes. The submit button is on a sticky bar at the bottom of the screen.

My question is: should the drop down of a combo box in a form be above or below the sticky bar?

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1 Answer 1


Above the sticky bar (I assume you mean z-axis). Otherwise the sticky bar covers the dropdown, making handling difficult.

Whenever the user opens a dropdown their focus is on it, not on the page as a whole.

  • i agree. however i'm wondering if the user keeps the drop down open and scrolls, will the dropdown move along with the scroll?
    – Blue Ocean
    Jan 20 at 9:36
  • Depends on where the mouse cursor is and whether the dropdown itself is scrollable. If it is, and the cursor is within the dropdown, then - of course - the dropdown should be scrolled, the rest of the page remains where it is. If the mouse is outside, the dropbox should move with the content, as it "belongs" to the input field it is attached to.
    – Gerda
    Jan 20 at 9:43

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