I can offer only rather clumsy solutions. 1. I have this problem in other programs, such as Word, too. My generic workaround is to insert three blank lines and place the table on the middle black line. Then you have blank space either side where you can shoehorn in more text. 2. Select the table. Its borders appear, shown in red. When you select a cell you get a tiny icon a bit like this: <o> (except there is an x inside the central circle). Clicking on either of the arrows lets you insert a row or column. The central x deletes the current row or column. Yes, you need to delete each row or column one by one. I did say it is clumsy.