You appear to be mixing terminology.
Do you mean changing the desktop background? Or changing an image on your personal webpage?
When scanning a picture it can change images into codes for input to the computer.
set as a desktop
To change the image of the homepage, you must have an account. Then click change background image in the bottom right corner of the homepage. It will then let you pic from a gallery or upload your own picture.
a Jonas brother picture
You can only do it by computer
If you're using interenet explorer, you go to: Tools >> Internet Options You'll see it right there at the top.
you ask someone on instagram
First you need to know which program is locking your homepage. Go to Control Panel > Add or remove programs and uninstall any program that you don't want on your computer. You can change the homepage at Tools > Settings > Homepage. Also, you can drag the website's favicon onto the home button.
Go on google.com and below the search bar it says "make google my homepage"
You can always change the homepage you click that opens up first. This can be done in the settings option in Chrome.
just go to the site for making it you homepage ,sometimes there is written "make it you homepage click it. Or right-click it and select homepage. For example go to Bing there will be written homepage click it
Go to "account", there it should have your current picture, and underneath it should say "change" click on that and it will give you a selection to use a picture from one of your videos or you can browse through your computer and use a picture you saved.