Just hit “TAB” to insert one new row, in PowerPoint 2010’s Table

I do not know what the real cause is for this problem. Sometimes when using the menu command showing a small menu on my Lenovo X220, both with keyboard or with mouse right button, the menu just disappears before I can do anything meaningful.

I happened to be in a hurry situation to create a PowerPoint slide with several tables, and then I had this problem again. I had to insert a new row into the table in PowerPoint 2010, but the only command I know is to bring up that fast-disappearing menu. It was really frustrating.

Luckily, I found this page.

PowerPoint 2007 Shortcuts

And the solution was just hit TAB at the bottom-right cell to insert one new row. My headache was solved!

By the way, can anyone help me about how to fix that fast-disappearing menu problem?