Let’s come back to pixels. I understand that it’s difficult for a beginner to understand what a pixel is. The best part is that we can see it. Figure 4.6 is a highly zoomed in image of woman. The squares that you are seeing in the encircled area are pixels. One square is one pixel. You can easily see that there are many square, and hence the pixels. These squares are combined together and created the image.

5 - Day 4: Create a New Document in Photoshop | 30 Days to Learn Photoshop

Figure 4.6 An Old Woman. This image shows what a pixel is. Each square that are seeing in the image is actually a pixel.

Color profile is like an instruction you are giving to Photoshop that instructs Photoshop to use only certain type of colors. By default it is set to “sRGB IEC61966-2.1”. I totally recommend you to leave this profile to default mode until and unless you know it.

Pixel Aspect Ratio basically determines the shape of your pixels. As you can see in Figure 4.6 that the pixels are looking like square. It is one of the best shape if you are working on a photo.

You can click on “save preset” and use that preset for again and again without filling the information again and again.

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Suggest one tutorial that I MUST write.

Here Ya Go!
Give it a try at least.