If you have already imported the Spacious demos and want to modify and customize its contents for your site then you can easily do it with Customizer.
From your WordPress Dashboard navigate to Appearance > Customize. You will be taken directly to the Customizer interface, with your site preview on the right, and the Customizer menu on the left. From here, you can choose the options you like.
Spacious Theme provides you with various options to customize your site and make it look impressive. It includes the options to customize each section of your sites i.e. header, footer, layouts, and many more. If you want to change the demo content and design for your page or post, please follow the theme documentation for each of them as needed.
If you want to change the Post content, then
- Go to Posts > All Posts.
- Hover over the post and click on Edit. After that, you can change the title, content of the post as well as Featured Image for the post.
- To select an individual layout for the post, you can select from Select Layout available in the bottom right of Page Editor. It is shown in the image below:
Similarly, you can edit the pages and its content.