The lower right corner of the worksheet is valid. Excel is a free office software. In excel, press ctrl+end to move the cursor to the lower right corner of the worksheet. MicrosoftExcel is a spreadsheet software written by Microsoft for computers using Windows and AppleMacintosh operating systems. Intuitive interface, excellent calculation function and chart tools, coupled with successful marketing, make Excel the most popular personal computer data processing software. 1993, as a component of MicrosoftOffice, after the release of version 5.0, Excel began to become the overlord of spreadsheet software on the applicable operating platform.