word inserts a new column to the right of the current columb
No. It will create a new line in a cell in the table in Word.
When you press the tab key from the last cell in the table it adds a new blank row to the bottom of the table.
how to move to the tabbed location within the cell of a table and not to the next cell
To get from cell to cell across a table as you enter text, press enter.
tab
row
TAB
The width of the content within the cell.
[Ctrl] + [Tab].
Tab.
The tab key.
You would use the TABLE TR and TD tags to set up a table. Then within a cell, which would be inside a pair of TD tags, you would use the IMG tag to enter your image.