LibreOfficeDev 24.2 Help
4x9en‖You can select adjacent cells, then merge them into a single cell. Conversely, you can take a large cell and divide it into individual cells.
Fp5tR‖Select the adjacent cells.
TVqy3‖Choose Table - Merge Cells.
ergLM‖Place the cursor in the cell to be split.
WDT2s‖Choose Table - Split Cells.
QvhBe‖A dialog allows you to split the cell into two or more cells, horizontally or vertically.