You can use "Split to Sections" to split a landing page into a few sections and edit each section one by one, which makes the editing much easier.
Please refer to the video:
https://www.youtube.com/embed/k1kB02XWvBM?si=xlFTnCBdOupEX74v
You can expand or collapse sections at the top of the left navigation panel
choose Root → select the whole landing page
choose any of the sections → section-only mode