Modify css size

Modifying CSS size is a basic skill in the website design process. By adjusting the size of CSS, the elements of the website can be presented better on the screen and have better visibility on devices of different sizes. The following will introduce in detail how to modify the CSS size.

CSS size units

In CSS, there are many different units that can be used to express size. Common units include pixels (px), percentage (%), EM, and REM. Different units have different advantages and disadvantages in specific usage scenarios and needs.

The pixel (px) unit is the most commonly used unit, and it is relative to the screen resolution. The higher the pixels, the larger the element. The percentage (%) unit refers to the size of the element relative to its containing box. The percentage unit is also very useful in most cases, as it allows the element to adapt to different screen sizes.

EM and REM units are relative to the font size. EM is based on the font size within the element, and REM is based on the font size of the root element (html). These two units are commonly used to set text size.

How to modify the CSS size

There are two main ways to modify the CSS size. One is to directly modify the attribute values ​​​​of the CSS style sheet through code, and the other is to use browser development tools. Modify in real time.

1. Modify CSS property values ​​through code

In the style sheet, modify the CSS size by modifying the CSS property value of the element. Taking modifying the font size as an example, you can find the element whose font size needs to be modified in the style sheet code, and modify its font-size attribute value to the required size, as shown below:

#example {
  font-size: 20px;
}

## here ##example refers to the element with the id "example" defined in the web page, in which the font size is set to 20 pixels (px).

Similarly, you can modify the size of different elements by modifying other CSS property values, such as modifying the padding, margin, width, height, etc.

Modify CSS in real time through browser development tools

Use browser development tools to modify CSS on the web page in real time, see the modified effect, and then save it into the style sheet. The specific steps are:

Open the web page to be modified in a modern browser such as Chrome, Firefox or Safari, and enter the development tool panel. The shortcut key is generally
1. F12.
In the development tool panel, find the Element Panel and select the element that needs to be modified.
2. Find the CSS property value that needs to be modified in the Style Panel, and modify it to the required size, and then you can see the modified effect in real time.
3. After the modification is completed, the modified CSS property values ​​can be copied to the style sheet and saved.

Summary

By studying this article, we can get the following conclusions:

In CSS, common units include pixels (px) and percentages (%), EM and REM.
1. You can modify the CSS size by directly modifying the attribute values ​​of the CSS style sheet through code. Find the element that needs to be modified in the style sheet and modify the attribute value to be modified to the required size.
2. It is also possible to modify CSS in real time through browser development tools. It can help users see the modified effects in real time and copy the modified results to the style sheet for storage.

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