creating visuals

Working with Photoshop to create visuals for your site - using CSS to create background images. We will work with selection techniques in Photoshop, use layer masks and optimise and save the images for a webpage.

lesson content

  • background images with CSS
  • file formats and PNG warnings
  • Photoshop selection techniques
  • working methods in Photoshop

lesson notes

  • images can be either directly embedded ito the page via HTML - or used as background images via CSS
  • any embedded image needs 4 essential elements: the image source, an alt tag (to show alternative text), as well as width and height values
  • values for image sizes in HTML are specified by measurement in pixel (without adding the unit), ie width=”120″ [NOT: width=”120px”]
  • GIF - use for flat coloured images such as logos (transparency with matte) = safe across all browsers
  • JPG - use for images with shading such as photos (no transparency) = safe across all browsers
  • PNG - quality fo JPG with transparency (refined transparency) = safe only across modern browsers (IE6 does not support PNGs, need to be replaced with GIFs)
  • when editing images - always use layermasks to allow for maximum editablilty
  • always save the working file including all layers (make sure to name your layers for a better workflow)

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