On Align bar (LibreOffice Impress, LibreOffice Draw), click
向下 (在邊框)
所選物件將與選取範圍中最下方物件的下邊緣對齊。To align the individual objects in a group, choose Format - Group - Enter Groupdouble-click to enter the group, select the objects, right-click, and then choose an alignment option.