Go to the "Posts" section and click on "All Posts" to view your list of posts.
Hover over the post you want to edit and click on "Edit."
In the post editor, locate the text you want to highlight and click and drag to select it.
Click the "B" (for bold) or "I" (for italic) button in the editor toolbar to apply the desired style to the selected text.
To add a custom highlight, you can use the "Text Color" button in the editor toolbar to change the color of the selected text to create a highlighting effect.
Preview the post to ensure the highlighted text appears as desired.