You can't modify the content of other people's web pages, only your own. The operation steps are as follows:

1. Let's take the topic page of Kuzhi. com as an example, as shown in the figure. The topic now is how to modify the content of the web page.

2. Let's right-click this topic and select the check element below.

3. In this way, we can locate the theme in the information of the code elements of the web page.

We can modify it by double-clicking the mouse. Then press enter to confirm. Return to the reward topic page, and you can see that the modification has been completed.