I use the marquee tool as a ruler to check if something is straight or not. Click the marquee icon on the toolbar – Click top left of the part of image to marquee – Click bottom right to make a box. Do not hold and drag.
To remove the marquee: Ctrl+D (for Deselect)
Click Image – Image Rotation – Arbitrary.
A pop up window will appear. Choose between CW (clockwise) or CCW (counter clockwise). Add a number for the angle. I usually use 1 and just repeat the process if it isn’t straight after hitting OK.
After clicking OK, this is how the image will look like. I will go ahead and crop the image to trim the white excess parts off.
Click the Crop icon. Select area to keep. Click the top left and click the bottom right to form a box. Do not hold and drag.
The parts excluded from your selection will be covered in black. It is transparent enough for you to see what is in those areas.
Hit Enter and you’re done!
You can save this as it is, or you can continue editing it like I do. After this step, I usually do:
- image resizing
- sharpening and denoising
- adding text