Navigating Through Sheet Tabs
By default LibreOffice displays one sheet "Sheet1" in each new spreadsheet document. You can add sheets using the (+) button at the bottom of the screen and switch between sheets in a spreadsheet using the sheet tabs.
If the sheet tabs are not visible, choose to display them at the bottom of the screen.
The navigation buttons are enabled when the number of sheets in the document is greater that the number of sheets displayed in the sheet navigation bar.
使用导航按钮可以显示文档中包含的所有工作表。点击最左边或最右边的按钮，就可以分别显示第一个或最后一个工作表标签。借助中间的按钮，用户可以向前或向后滚动所有的工作表标签。要显示某个工作表的内容，请点击该工作表对应的工作表标签。
Left click: Adds a new empty sheet to the right of the current sheet.
Right click: Opens a sub menu with all sheets not marked hidden. Click on a sheet name to jump to it. Hidden sheets are not listed in the sub menu.