Brief Introduction to Photoshop


Cropping

Open any image in your Photoshop. Select the Crop Tool (Press 'C' to Select or Select it with your Mouse) and draw a selection on your image as shown below. (To make a selection click and drag with your mouse)

Make a selection




After you made your selection press Enter




Result




Cropping images is actually that easy in Photoshop, just select the area you want to keep and press Enter on your keyboard, and you are done. You can also press on the Move Tool instead of pressing Enter on your keyboard, it will prompt you a window similar to the one shown below. If you are satisfied with your selection just press on the Crop button and your image will be cropped.




Copying & Pasting

Open any image in your Photoshop. Select the Rectangular Marquee Tool (M) and make a selection on the image as shown below.

Make a selection and press Ctrl + C or
go to Edit > Copy




Presss 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




Whenever you make a selection on the image and copy that area, Photoshop automatically saves the dimensions of that selection in its memory. Thus when you open a new window, dimensions of the image will already be in the Width and Height fields.

Image Adjustment

Go to Image > Adjustments. You will see the menu as shown below.




Go ahead and try some of the effects on your image, try to change the Brightness/Contrast, Auto Color...etc. Sometimes using Photoshop's pre-defined Image Adjustment options will solve your problem, try using Auto Levels, Auto Contrast or Auto Color on your photos before you proceed with other options.