Exercise 02:02: Pixels, Sizing and Selective Masking


The goal of this exer­cise is to develop the use of selec­tion tools to improve visual qual­ity, con­ti­nu­ity and inter­est of images in visual communication.


Prac­tice a pre­scribed set of tasks that allow the explo­ration of the essen­tial tools of photo editing.



This exer­cise seeks to refresh the devel­op­ment of mask­ing tools in Adobe Pho­to­shop. Mask­ing should be non-destruc­tive, mean­ing that any elec­tion and sub­se­quent trans­par­ent pix­els should be editable, not removed. Selec­tion of pix­els is the first step in mask­ing, which make it an essen­tial, though sub­tle skill requir­ing finesse and experience.

Search the inter­net for images that could be can­di­dates for use. Please use images that have Cre­ative Com­mons (or sim­i­lar) rights such as Pex­els or Unsplash. The con­tent is optional, just select an image that will best match the selec­tion tool required.


  1. Mar­quee Tools
  2. Lasso, Polyg­o­nal Lasso, or Mag­netic Lasso
  3. Object Selec­tion
  4. Quick Selec­tion
  5. Magic Wand
  6. Select Color Range
  7. Select Focus Area
  8. Select Sub­ject
  9. Select Sky
  10. Paint­brush in Quick Mask Mode

Please use the Select> Mod­ify menu to adjust and soften any selec­tions as nec­es­sary. Doing so will make edits less obvious.

Sub­mit indi­vid­ual files at a max­i­mum res­o­lu­tion of 5 x 7 inches (2100 x 1500 pix­els), at 300 dpi in Pho­to­shop (.psd) for­mat to the appro­pri­ate D2L Dropbox.


  • The fol­low­ing rubric posted on D2L will deter­mine exer­cise score: Exer­cise Grading


Mask­ing, select­ing, mod­i­fy­ing, image size, saving


Adobe Pho­to­shop, images, com­puter, internet


As defined by cor­re­spond­ing cal­en­dar item, drop­box, dis­cus­sion or con­tent topic description.