The Parameters

Are those values that must be specified in the attributes and vary depending on the attribute used. In the table below you can see how they can be expressed, and some of them are equivalent, they produce the same result in this case is up to you to decide which one to use according to your tastes, needs and habits.

Unit of measure:

I used the attribute font-size: example; with the values and the parameters reported in the result column.

Unit of measure	Description	Example	Result
cm	Cm	font-size: 1cm;	Result
mm	Mm	font-size: 7mm;	Result
in	Inch	font-size: 0,25in;	Result
pt	Points	font-size: 12pt;	Result
pc	Pica(=12 points)	font-size: 2pc;	Result
px	Pixels	font-size: 25px;	Result
em	Mon. letter m	font-size: 2,5em;	Result
ex	Character height x	font-size: 3ex;	Result

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Absolute values:

I used the attribute font-size: value; with the values and the parameters reported in the result column.

Value	Syntax description	Result
xx-small	font-size: xx-small;	Result
x-small	font-size: x-small;	Result
small	font-size: small;	Result
medium	font-size: medium;	Result
large	font-size: large;	Result
x-large	font-size: x-large;	Result
xx-large	font-size: xx-large;	Result

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Values:

I used the attribute font-size: value; with the values and the parameters reported in the result column.

Value	Syntax description	Result
smaller	font-size: smaller;	Result
larger	font-size: larger;	Result

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Colors:

I used the attribute color: value; with the values and the parameters reported in the result column.

Value	Syntax description	Result
name	color: green	Result
value of the hexadecimal	color: #008000;	Result
value RGB	color: rgb(0,128,0);	Result
percentage RGB	color: rgb(0%,50%,0%);	Result

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Positioning The Box

Attributes and Parameters to define and place a box, an example of a reference:

<div style=”position: absolute; left: 100px; top: 50px; z-index: 5;”> content </div>

with values and parameters shown in the table below.

Attribute	Parameter	Description
position	absolute – static – related	The way in which can be placed in a container (box).
left	cm – mm – in – pt – pc– px – ex – em	the distance of the container from the left edge of the browser window.
top	cm – mm – in – pt – pc– px – ex – em	the distance of the container from the top edge of the browser window.
height	cm – mm – in – pt – pc– px – ex – em	The height of the container when it is positioned in absolute mode.
width	cm – mm – in – pt – pc– px – ex – em	The width of the container when it is positioned in absolute mode.
overflow	visible – hidden – scroll	Content that exceeds the Width Height of the box container.
visibility	visible – hidden –	Visibility or less of a container (box).
Z-index	xx (positive numbers)	The order of priority of display of a container (box).