Photoshop

4. Crop tool- is used to cut off a portions of your photo. Only the parts you want will remain.

5. Lasso tool- is used to select a specific part of a photo. Any adjustments you make will only affect this portion that photograph. 

6. Text tool- It allows you to add text to your image. Using the text tool, you can type lined text, or you can click-and-drag in order to create a text box.

7. To undo a mistake you've made you use Command-Z (Mac) or CTRL-Z (PC). 

8. To undo more than one mistake, you have to pull up the History palette. You go to Window and then to HIstory menu. Then just click on a previous item on the list and it will undo every action listed after it.

9. To rotate an image you go to the image menu and select Image Rotation. Have the image open and click on the crop tool and click and drag open a box on your image. On one of of the corners of the box it will change your cursor into a curve and that curve indicated that it will rotate your crop. 

10. If you don't like your cropping box you can use the cancel icon,  which looks like a no-smoking circle, to cancel your crop. Then redo your crop the way you will like it.

11. You can tell photoshop which dimension the image should result in after you crop. Your crop box will then be forced into a certain ratio.

12. The correct resolution for newsletter or newspapers is in the range of 150 to 200 ppi

13. The correct resolution for magazines are preferred higher, so 250 ppi or more.