Starting new spreadsheets
You can create a new, blank spreadsheet from the Start Center (Welcome to OpenOffice.org) or from within Calc or any other component of OOo, for example from Writer or Draw.
From the Start Center
Click the Spreadsheet icon.
From the Menu bar
Click File and then select New > Spreadsheet.
From the toolbar
If a document is open in any component of OOo (for example, Writer), you can Use the New Document
icon on the Standard toolbar. (This icon is always a page of text from the current component with a black down-arrow to the right.) Click the down-arrow for a choice of which type of document to open (text document, spreadsheet, and so on). Click the button itself to create a new document of the type that is currently open. (If a spreadsheet is open, a new spreadsheet document will be created).
From the keyboard
If you already have a spreadsheet open, you can press Control+N to open a new spreadsheet.
From a template
Calc documents can also be created from templates, if you have any spreadsheet templates available. Follow the above procedures, but instead of selecting Spreadsheet, select the Templates icon from the Start Center or Templates and Documents from the Menu bar or toolbar. On the Templates and Documents window, navigate to the appropriate folder and double-click on the required template. A new spreadsheet, based on the selected template, opens.