I pressed a command and my code disappeared - how to get is back?

Questions
,
1

Hi! I did something unwillingly and my code now looks like that:
Cell[BoxData[
RowBox[{
RowBox[{“(", " ", “PARAMETERS”, " ", ")”}], “[IndentingNewLine]”,
RowBox[{
RowBox[{
RowBox[{“e”, “=”, “0.2”}], “;”}], “[IndentingNewLine]”,
RowBox[{
RowBox[{“kmax”, “=”, “100”}], “;”}], “[IndentingNewLine]”,
RowBox[{
RowBox[{“data”, “=”,
is there a way to get it back in the usual Mathematica language?
Thanks!

2

(0) Save your notebook, under a different name, in case anything goes wrong.
(1) Select cell bracket on the right of that raw stuff (position mouse on it and click, if this is not familiar).
(2) Shift-control-eh (shift command e on Mac).

(Thank you David Reiss for correcting my earlier mistaken version.)

3

I think you mean (at least on the Mac) shift command E. (it also is the menu item Cell/ShowExpression)