Large Excel file size

[Guest]

I am creating a number of small sheets using the top left hand corner of the
available space (A1 to AN45). However, if I hit [End] [Home] the cursor goes
to the bottom right hand corner of the sheet, (cell IV65536), despite the
cells from AN45 to IV65536 being empty. I frequently select all of the blank
rows (and columns) and delete them. This results in a small file becoming
significantly large. How do I correct this problem?

 

[Ron de Bruin]

Have you save/close/reopen ?

See
http://www.contextures.com/xlfaqApp.html#Unused