protected boolean editBelowField() {
		int row = model.getRow();
		int modelColumn = model.getColumn();

		// Get the current row (index) and column (fieldNum).
		int index = row;
		index++;

		int numComps = model.getRowCount();
		if (index < numComps) {
			row = index;
			table.setRowSelectionInterval(row, row);
			if (model.isCellEditable(row, modelColumn)) {
				return beginEditField(row, modelColumn);
			}
		}
		return false;
	}
Puts the cell into edit in the row below the current (row, column) location.
@return true if there was a table cell below that could be edited.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/CompositeEditorPanel.java