clone stamp
Photoshop supports a maximum pixel dimension of 300,000 by 300,000 pixels per image.
Pixels per inch.
Yes.
Its the amount of pixels per inch
Filter -> Blur
Dodging is lightening pixels, Burning is opposite.
Replacing and blending pixels at same time.
Raster or Bitmap image.
Photoshop is an image editing program. Resolution is the term used for how dense an image is pertaining pixels. Photoshop can handle any range of resolution as long as the computer has enough speed and enough RAM (Random Access Memory) to handle large resolution images. Within Photoshop, resolution refers to pixels per a measure of length. In the US, it is usually measure as pixels/inch. In Europe, pixels/centimeter. A pixel is the smallest "part" of an image, so higher the pixel/inch gives the image more detail and "crispness."
To clone means to replace pixels on area where you paint with pixels from sampled (source) area (first you must choose source area).
It is tool which replaces pixels from sampled area to the area which you are painting with this tool. Along with pixel replacement this tool heals or blends pixels. Blending mode determines how pixels from sampled area blend with underlying pixels in the image (area where you paint with healing tool).
The size of banner design in Photoshop is 851 width and 351 height in pixels You can also used 2667 width and 1617 hight pixels but basically on Pixallab, click the link below to see this banner size