The easiest way:
1. Get a image that is bigger than 800x100 and use it as a banner (resize and/or crop if needed)
atau make it online.
The hardest way:
1. Get photoshop atau something like that
2. Start a new project
3. Enter the measures (800x100)
The seterusnya steps will only depend on how good anda are with it 4. Select a few imej anda want to use and open them (it won't affect your project)
5. Chose the part of the pictures anda want to use (If anda wanna use the entire picture, just copy and paste it there)
6. Add a few effect atau text
7. Save it as a image file (.jpg, atau .png)
the hard way is way lebih complex than that and requires a bit of skills around an image edition program (which requires a lot of practice and time), so if anda want something quick, go for the easy way.
Plus, check
link for lebih help.
