Row / Column Header not fully shown in Normal View

Hi All,

Recently I come across a file with only 1 sheet, in which is a table only occupied an array of A1:Q49. In Normal View I can see the row / column header of A-Q and 1-49 as usual, but nothing outside that range (only grey colour). Also, the empty cells outside A1:Q49 are all grey too. How can I do that? Kindly please advise, thanks.