They you need to add CSS padding to the element in question. You’ll need some way to specify which element you want the padding to affect. If the element has and ID, you acan style directly specifying that ID. So if it is something like <img src=“this.jpg” id=header” /> you can put 15 pixels of padding on the left of it by a CSS statement like
#header {padding-left: 15px;}
Be a bit more careful if the element you want to style is a class, because it can be used in mutliple places on a page, and you may want the padding affecting only one such place. In that instance, or in instances where your element has no style nor class, it is best to style by climbing up the hierarchy to the containing block-level element that does have and ID. You might end up with something like
table#header tr td img {padding-left: 15px;}
When doing this, be careful to ensure your style applies only to the element you want to change. The CSS above would touch every image within the TABLE with the ID, Header.
Look up CSS padding shorthand if you want to apply padding of different dimensions all around an element.