LibreOffice: Advent Tip #12

 LibreOffice Calc allows to select a large number of cells without using the mouse (which might be rather awkward if the area is extremely large). To select the area, it is necessary to enter the range in the Name Box. For instance, to select the cells between A1 and I20, as in the picture on the left, you enter A1:I20 and press Enter on the keyboard.