Adobe Photoshop Lesson 4 and 5

Objectives

• Create elliptical and rectangular selections
• Lasso tools
• Combine selections
• Remove portions of a selection
• Save and load selections

Selection Tools

• Used to specify areas of editing within an image.

• The Option Bar Settings, contains options for changing:

1. Selection behavior
2. Feathering
3. Aliasing

Example of Aliasing and Feathering

Creating Elliptical and Rectangular Selections

• By clicking right-click the mouse button on the Marquee tool icon opens the Alternate tool available
• Dragging it will create an area outlined by dotted lines that shows the user which area has been selected.
• Setting fixed aspect ration will lock the selected region to a specific ratio

Adding and Removing Parts of a Selection

• Click on the Add to Selection button on the options bar before creating a new selection to the selection area
• Add to Selection button enables the user to add a new selected area to the image
• Select > Inverse will inverse the selected area, which means the area which is not selected by the user, will be selected, moreover, the area which is selected, it will be deselected.

Feathering

• Softens the edges of a selection

• Keyboard shortcut

1. M = toggles the Rectangular and Elliptical Marquee tools
2. cmd/ctrl + i = Inverses selection
3. cmd/ctrl + D = deselects selection
4. cmd/ctrl + H = hides the dotted lines
5. Hold shift to add to a current selection
6. Hold Opt/alt key to subtract from current selection

Lasso Tool

There are 3 types of lasso tools:

1. Polygonal lasso tool, which creates a straight sided selections.
2. Magnetic lasso tool, which tracks the edges of an objects.
3. Lasso tool creates selections based on freehand trading.

Saving and Loading Selections

• Select > Save selection in order to save a selection
• They are saved in Alpha channels
• Channels contain specific image data:

1. Black and white images which contains one color channel
2. RGB which contains 4 color channels
3. CMYK contains 5 color channels

Interested for more? Click here

Chapter 1: http://sthaboutmultimedia.blogspot.com/

Chapter 2: http://sthaboutmultimedia.blogspot.com/p/blog-page.html

Chapter 3: http://sthaboutmultimedia.blogspot.com/p/blog-page_6.html
Chapter 6&7: http://sthaboutmultimedia.blogspot.com/p/blog-page_42.html
Chapter 9&10: http://sthaboutmultimedia.blogspot.com/p/blog-page_82.html