Using a tv as a mirror display

I have an 09 Imac , no thunderbolt display port , I,ve set up an HDMI cable to my new tv. I can mirror my desk top but I can't get the upper tool bar to show up how do I fix this .I also have black lines on the left and right sides of the tv can I strech the desk top some how ?

I can't get the upper tool bar to show up
Look for picture size settings in the TV, such as 100%, full-size, pixel-to-pixel.
If you can't fix it in the TV, look for Overscan or Underscan settings in the OS X Displays system preference.
I also have black lines on the left and right sides of the TV.  Can I strech the desk top some how?
You must have a 20" or 24" iMac.  They have a 16:10 display shape.  The TV is 16:9, wider than the iMac, so will show black bars at the side when mirroring.  You have to disable mirroring in Displays Arrangement tab to fill the screen.  In that tab you can drag the menu bar to the picture of the external display to make it the main display.

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