Creating a high-resolution banner image is a fairly easy task that can be done in any graphic design application. There are two factors that determine the resolution of a banner: the pixels per inch (PPI) and the original size of the image dimensions. If you are creating a banner made of entirely original graphics, you have complete control over the resolution. If you are using a photograph to make your banner, the photo needs to be high resolution before you begin. Ensuring that your banner has a high resolution begins when you first create your new document. No matter which application you are using, the process is virtually identical.
Photoshop
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Step 1
Launch Photoshop and click on "File," then "New" to create a new document.
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Step 2
Set the height and width dimensions to the size the banner will be displayed at. For example, if you are making a Web banner that will be 75 by 300 pixels, then you would simply enter those numbers in the height and width fields with "pixels/inch" set as the unit of measurement. If you are making a banner for a print ad that needs to be 2 by 6 inches, then you would enter those numbers in the height and width fields with "inches" selected as the unit of measurement.
Step 3
Set the resolution at "72 pixels/inch" for a Web banner. Set the resolution at "300 pixels/inch" for a print banner. Click "OK."
GIMP
Step 1
Launch GIMP and click on "File," then "New" to create a new document.
Step 2
Refer to Step 2 from Section 1.
Step 3
Refer to Step 3 from Section 1.
Paint.NET
Step 1
Launch Paint.NET and click on "File," then "New" to create a new document.
Step 2
Refer to Step 2 from Section 1.
Step 3
Refer to Step 3 from Section 1.