As I was trying to save my notebook by hitting
ctrl + s, I might have hit a different letter by accident and something unexpected happened:
An extra row appeared below the menus at the top:
and the check-mark seems to now permanently be set in:
Window -> Toolbar -> Formatting
(I tried clicking on it several times, but this check-mark never goes away.)
Worst of all, when creating a new cell, the cell now defaults to a Text cell instead of an input cell.
What happened here? Is there some way to revert my notebook to its original standard behavior?
Following suggestions in the answers, the EditBar is now gone, but all my calculation cells are still indented inward, while text cells are not indented, and creating a new cell also still defaults to a text cell instead of input. Any idea how to fix that?
Also, In: and Out: labels at the left are now grey and turn orange upon evaluation for some reason. This color scheme was not present before...