Adsense layout

am using the tower layout for my adsense. The ads are stacked on top of each other with the first ad at the top then under it is the second ad and so on. This works for most of my [ages but sometimes I would like to use the horhorizont layouts with one on one page and the other on other pages without screwing everything ;f so when I log into my adsense; account what should I do to get the horhorizontalpan>; code without messing up my tower layout. If you can use both layouts then will it hurt my income in anyway?

Try something.... keep records.... change it... see what happens... change it again.... see what happens.... repeat, repeat.

My high traffic pages have been through at least 20 different formats. Huge differences in the lowest yield compared to the highest.

We are not running the highest yield. We are running the highest yield that we think will still attract natural links.

The horizontal codes are generated by chosing banner on the ad format tab
To see what works best you really need to do a little testing on your site. try different formats, different positions and different colour schemes and see which converts the best
What works on one site may not work on another
Good luck

You should be keeping records on your results with every change in your design. Also I'd say it depends on your niche on your design and what kind of ads you are generating.