I am running Version: 4.2.6.3 in Calc.Build ID: 420m0(Build:3) English
The OS is the updated version of MInt 17, Cinnamon 64 bit English
Is it possible to provide a screen shot?
Check the Zoom slider in the bottom right corner (Status Bar) - if your zoom % is significantly less than 100% you will see a very large portion of the sheet.