To select multiple sheets in a spreadsheet, hold down Ctrl, and then click the name tabs at the lower edge of the workspace. To select multiple cells in different areas of a sheet, hold down Ctrl and drag in the different areas. You cannot edit the components of the matrix. To create a matrix in which all the cells contain the same information as what you entered on the Input line, press Shift+Ctrl+Enter. Hold down Alt+Enter+Shift to apply the cell format of the input cell to the entire cell range.
To fill a selected cell range with the formula that you entered on the Input line, press Alt+Enter. Try to assign different keys either for LibreOffice, in Tools - Customize - Keyboard, or in your desktop system. Keys that are assigned to the desktop system are not available to LibreOffice. Some of the shortcut keys may be assigned to your desktop system.
