Introduction to Photoshop

It is not in detail it will cover enough  to teach you how to edit (resize, crop, merge) images by yourself without asking somebody else.

Tools and Options Panel

	Move Tool	select and move images (objects) on any active layer.
	Rectangular Marquee Tool	making selection on the image (objects) on any active  layer.
	Magic Wand Tool	making selection (similar colors at once for example)
	Polygonal Lasso Tool	free selection
	Slice Select Tool	selecting slices
	Crop Tool	cropping images
	Patch Tool	correcting images
	Brush Tool	drawing freehand
	History Brush Tool	restoring specified history state
	Clone Stamp Tool	selecting a source and copying (drawing)
	Gradient Tool	gradient effect on images
	Eraser Tool	erasing
	Dodge Tool	making images lighter (And Burn tool makes the opposite – darker)
	Horizontal Type Tool	inserting text to image
	Path Selection Tool	selecting the active path
	Custom Shape Tool	insert pre-specified (ready) shapes to image
	Pen Tool	creating vector shapes
	Eyedropper Tool	selecting color
	Notes Tool	inserting notes on the image
	Zoom Tool	zooming in or out
	Hand Tool	dragging image

 
Working with Images

1. Cropping

• Select the area you want to keep 
• Press Enter on your keyboard
• You can also press on the Move Tool instead of pressing Enter on your keyboard
• If you are satisfied with your selection just press on the Crop button and your image will be cropped. 

Make a selection	After you made your selection press Enter	Result

 2.Copying & Pasting

• Make a selection and press Ctrl + C or go to Edit > Copy
• Press Ctrl + N to open a new window or go to File > New and press OK
• And now press Ctrl + V to paste the copied image or go to File > Paste  

3.Image Adjustment

• try some of the effects on image by using Brightness/Contrast, Auto Color.
• Sometimes you can use Photoshop’s pre-defined Image Adjustment 
• Try using Auto Levels, Auto Contrast or Auto Color on your photos before you proceed with other options.

4. Working with Texts

• Select the Horizontal Type Tool (T) and click on the window 
• If you want to make changes to your text, highlight it and change the properties from Options Panel
• When working with Texts it’s important to click on Move Tool (V) after you are done typing. 
• There is another way to change the properties of the Text ,by using Character Panel. 

5. Working with Layers

• the blue circle is located on the Top Layer, named the Layer as “Circle”, 
• red rectangle is on second layer, named this layer as “Rectangle”. 
• Layer that is on top of the stack will cover the layers below. Thus you see the Circle covering Rectangle. 

 

5.1 Changing layer positions

•  To move the particular layer just click on it with your mouse and while still holding your mouse move it up or down. 
• Or you can click on the Layer that you want to move and use shortcut keys on your keyboard to move it up ( Ctrl+] ) and down ( Ctrl=[ ).

5.2 Active Layer

• Active layer is the layer which you are working on .
• active layer will always be highlighted (selected).
• you want to move particular object you should select it’s respective layer first, then only you can move it.
• The “Eye” icon on the left of the layers means that the layers are currently visible, if you toggle them off then the object will become invisible.

As you can see from the screenshot above, I have deselected/removed the eye icon from the layer Rectangle. We still can see the rectangle in the Layers Panel but it is not visible on our image – we can only see the blue circle.

 
6. Saving for Web (as JPG or GIF)

To save your image for web go to File > Save for Web or press Alt+Shift+Ctrl+S and you will see an identical window and you can choose which format you want to save.

Source :
http://www.adesdesign.net/blog/tutorials/photoshop/introduction-to-photoshop/