Preview Content across Varied Window Sizes
You can maximize or minimize the preview window on the entry editor page as per your preference.
For better visibility, you can also open the preview window in a new browser tab. To do so, click the Open in New Tab icon, on the top right corner of the Live Preview pane.
Whenever you are done previewing, close the additional tab by clicking on the cross (X) on the top right corner of the preview pane and get back to the preview window in your entry editor. Additionally, you can also click on Open Live Preview inside the preview pane to close the additional tab.