Chapter 6 & 7: Working with Layers and Layer Styles

Layer

- A layer is any image on a transport background which is stack of another.

- Combination of several layer called merging.

Functions

- create composite image                - add special effects

-create complex projects                 - repair photos

- correct colour 

Types of Layer

- Normal layer : added on top of current layer

- Adjustment layer :modify an image without destroying the pixels

- Layer mask : protect area of layer

- Shape layer : contains vector images

- Type layer : contains text

Merge & Flatten Layers

- Merging : combining two or more layers

- Flattening : combining all layers in one file to optimize the file size

- Linking : connecting layers together (layers move together)

Layer Style

- adding special effects to the layer 

Chapter 4 & 5: Making and Manipulating Selections

Selection Tool

- enabling yourself to only paint in one area while the rest of your canvas is left unaffected.

Aliasing

Feathering 

- softening edges of image

Lasso tool

- Polygonal Lasso Tool : it allows us easily draw free form selection outlines based on straight sided                                            polygonal shapes.

- Magnetic Lasso Tool : tracks the edges of an object based on colour tone

- Lasso Tool : free hand tracing for selection

Transforming Selection

- scale    -rotate   -skew   -perspective   -flipping

Chapter 3: Painting and Drawing with Colour

Working with the Brushes Palette

• control how the painting tools interact with the image.
• to customize and create brush in many ways

Painting Tools

• add colour and retouch images 
• works only on bitmap images which means image that has pixels

Creating Gradient

• 5 option of gradient
• there are a few preset gradient available in option bar

Eraser Tool

      -  2 type of eraser : Background eraser => delete pixels of background layer                                                       Magic eraser => delete the area that clicked which is same colour

Chapter 2: Viewing and Managing Documents

Colour modes

- colour mode = colour spcae / colour model
- visible spectrum = colours that can be seen by human eyes
- gamut = produce by device

History palette

- undo multiple commands

- it has list of recently executed commands

Changing on screen size of an image 

- click Image > Image size