Class tips for 3-3-2016

Ctrl -O to open an image or choose file
Ctrl-S to save an image

General tips on file format,

• PSD - This the native file for Photoshop.
• GIF & JPG - These are use for web graphics (Meaning joint photographic expert group)
• TIF - This is a known format for printing (Tag image file format).
• RAW - This is a format for digital cameras.

File formats to saves layers.

• PSD - Photoshop document
• PDF - Portable document format
• PSB - Large document formats ( use for files size that are larger than 4gb
• TIFF - Tagged image file format.

Understanding the toolbar.

Tools in Photoshop can be access from the toolbox. some tools can be found when you click the the small triangle icon below each tools. 

tool can also be access by pressing the right key on the keyboard. 

short keys for foreground & background

M - marque

L - lasso

v- move

The navigator palette is also helpful for when zooming or to scale .

ctrl + /- use for zooming in and out while ctrl /space-bar is use to activate the zoom. 

 

How to start photoshope

goto ctrl m - new file, F7 (layers)

Web

Size 800 * 600

Canvar is the name  of the place we draw and design our work.

to chaneg your background goto layers, click background, click  toolbar then paint bucket tool.

What is a Pixel.

This is a tiny rectangle that contains information about a color in a particular location in an image.

the "PIX" means PICTURE while "EL" means ELEMENT.

we need about 72PPI(pixel per inch) to display an image on screen while for professional quality project 300PPI .

we us this formula to calculate the amount  of color in a bit.  COLOR = 2n

1bit = 2 color, 4bits = 16 color, 8bits = 256, 16bits = 65,536 color, 24bits over 16million.

Types of resolution;

• image & monitor = ppi meaning (pixel per inch)
• printers resolution = dpi meaning (dots per inch), 

A 1200 dpi printer uses 1200 dots of ink in every inch to make up the colours.

16 smaller ink dots = (1200dpi and that is equivalent to print 1pixel).

 The higher the resolution of an image, the more clear and detailed the image looks when it’s printed, at least up to the limitations of the printer.

Higher resolutions print a smaller image, and lower resolutions print a larger image, given the same on-screen size.

• Some disadvantages image resolution

Some effect of a high resolution is that it increases file size,  this makes the image slow to edit in Photoshop and takes relatively longer to print and to transfer.

Tips

pixel is used to measure the on - screen size while the print size is used after print out and to measure it we use its dimension.

formula for on-screen size to print size is =  ON SCREEN SIZE/ RESOLUTION = PRINT WIDTH