Excel Sheet has 2^20 Rows and 2^14 Columns. Instead of Using the blank cells appearing. It is better to hide all the unwanted blank cells.       How:?   Step 1:  Select the Row from Which you want to hide    Step 2:  Press Ctrl+Shift+Down Arrow to Select all the rows till 2 ^20    Step 3:  Right Click and Select Hide    Step 4:  Select the Column from which you want to hide    Step 5:  Press Ctrl+Shift+Right Arrow to Select all the columns till 2 ^14.    Step 6:  Right click and Select Hide   You are Done now.  See the Demo Below:      Back to MS Excel>>   
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