Twitter has now made even it even easier to upload new picture, even image or background image to your file.
You can edit your profile photos by clicking the " Edit profile " button at the top of your Twitter profile page, which will allow you to click and edit individual parts of your profile - such as the profile picture b background image and even your personal description
For profile photo,acces the fordward facing camera on your computer and snap a quick profile pict. For header and background images , just drag and drop photo from your computer and make quick on the fly adjustment.
Once upload image can be dragged around on the page until you select just the right area to hone in on.