Photo in the text box??
 

I seen on a few forums that there is a photo inside the text box when typing in the Quick response box and the reply text box. Anyone know how this is done?

Do you mean an image from the post in the text box or like an image in the background?

Image in the background, so when they type they are typing over a transparent photo.

Edit your Main CSS

AdminCP > Styles & Templates > Style Manager > (From right panel drop down menu) Select "Main CSS"

Look for the WYSIWYG Editor CSS and add and image to the background. (You should be able to see examples of it being done to other elements, follow that template)

the part that says background I can just add the html in that line?

CSS

See how it is done for others and it should give you an idea of what to put.