cannot input data the speadsheet keeps highlighting

A

andre

When i click on anything in the Work Sheet it is
highlighted. i cannot click on any cell within the
worksheet or input any data.
i went through all the options but i cannot figure this
out.
 
G

Guest

that did not work.
i cannot even enter information into the cells.
when i close excel and reopen. it does not chnage anything
 
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