You right click on the image and click save as... and then save it where ever you want on your computer.(don't know what the difference between an picture and an icon though)
Save a gif to your computer and upload it as your profile picture on Twitter.
Yes.
An icon, or ikon, is a religious picture. The computer 'icon' was named after it.
If you save a picture from the internet into your pictures folder or desktop, then you can right click the icon of the picture that you want and select 'set as wallpaper'.
an icon
it is somthing that you save your things in
When you post your picture, you can save it clicking on "Share>Download" in the Options icon. Then if you want you can delete the post. Is the only way I've been able to do it by the moment, sorry.
icon
icon
Icon
Tell your parents to get rid of it :D, but if they said no its a no xD
save the image, right click and choose properties, change icon, browse for the picture