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Working with Selections. Intro to Photoshop. Chapter Objectives. Make a specific selection of an image using selection tools like Quick Selection, Magic Wand, Marquee Tool, Lasso Tool, Polygonal Lasso Tool and Magnetic Lasso Tool Reposition a selection Marquee

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working with selections

Working with Selections

Intro to Photoshop

chapter objectives
Chapter Objectives
  • Make a specific selection of an image using selection tools like Quick Selection, Magic Wand, Marquee Tool, Lasso Tool, Polygonal Lasso Tool and Magnetic Lasso Tool
  • Reposition a selection Marquee
  • Move and duplicate the contents of a selection
  • Use keyboard-mouse combinations that save time and hand motions
  • Deselect a selection
  • Adjust the position of a selected Area using the arrow keys
  • Add to and Subtract from a selection
  • Use multiple selection tools to make complex selection
  • Erase pixels within a selection
about selecting and selection tools
About Selecting and Selection Tools
  • Making a change on a part of your image is a two-step process. First you need to select part of an image you want to change and then you use another tool to manipulate that image like resize it, change its angle, create shadows, sharpen etc.
  • Four types of selection in Photoshop, namely:
    • Geometric Selection – you could make a selection based on the geometric shape of an object, like if it is a square or rectangle you choose Rectangular Marquee Tool but if it is a circle or an ellipse you choose an Elliptical Marquee Tool.
    • Freehand Selection - if it is a polygonal shape or hard to define shapes then you choose a freehand selection tool like the Lasso Tool, Polygonal Lasso Tool and Magnetic Lasso Tool.
    • Edge-based Selection – Photoshop will automatically find the defined edges of an image like the edge of a car, tree etc.
    • Color-based Selection – Photoshop will automatically select parts of an image based on the similarity of color of adjacent pixels.
geometric selection tools
Geometric Selection Tools
  • Allows you to select image based on the geometric shape of the selection that you want to make.

Shortcut Keys

Marquee Tool

Types of Marquee Tools

Rectangular – Allows you to select rectangular objects

Elliptical – Allows you to select elliptical or circular objects

Single Row – Allows you to select single row of pixels

Single Column– Allows you to select single column of pixels

Mouse Operations

freehand selection tools
Freehand Selection Tools
  • Allows you to select image that are polygonal or are hard to define shapes.

Shortcut Keys

Freehand Selection Tools

Types of Marquee Tools

Lasso Tool – simply drag the lasso around the area you want to select and then return back to its first point.

Polygonal Lasso Tool – select multiple points in the object of your choice and then close the loop by selecting the first point that you made earlier.

Magnetic Lasso Tool– select a single point and then just drop the lasso and the Photoshop will automatically detect edges on the portion of your image that you choose.

edge based selection tool
Edge-Based Selection Tool
  • Photoshop will automatically find the edges of the area of your choice as you “paint” around that area.

Shortcut Keys

Quick Selection Tools

On Options Bar you will see this:

New Selection

Add to Selection

Subtract From Selection

color based selection tool
Color-Based Selection Tool
  • Allows you (actually Photoshop will do it for you) to automatically select parts of an image based on the similarity of color of adjacent pixels.

Shortcut Keys

Magic Wand Tools

On Options Bar you will see this:

Intersect with Selection

New Selection

Subtract From Selection

Add to Selection

tips with selections
Tips with Selections
  • On Marquee Tools
    • Space Bar pair with a Mouse drag allows you to reposition your selection anywhere.
    • Shift Key pair with a Mouse drag allows you to create either a perfect square if you are using Rectangular Marquee or a perfect circle if you are using an Elliptical Marquee.
  • On Any Selection Tool
    • Using Arrow keys allows you to reposition your selection anywhere or up/down and right/left.
    • Using Move Tool along with Alt key allows you to make

a copy of your selection.

    • You could resize, rotate, skew, distort etc your selection by using Transform from EditTransform menu.