Andrea, I think it is explained just fine and I would actually like to leave it in. My reasoning is that by saying "While the rendering is in progress some frames from the timeline are displayed in the Compositor window, but it has no bearing on the actual rendering process" it makes it clear to the user that it does not affect the render (i.e. has no bearing). The first time I saw the compositor changing the image while I executed my first render, I was wondering what that was. By leaving it in, it clarifies that for the user.

However, if you prefer it to be removed, I will do so. Thanks, Phyllis

explained the Compositor thing wrong. I meant

that a fourth item, that is, using the tools in the Compositing window
during editing, could affect the result of the render file. Instead it
does not: all operations in the Compositor window do not affect the
render, only the three items that are listed have influence.
I had put a sentence inside the "timeline" item because it is in the
Compositor that we see the timeline and we might be led to think that
these tools are also influential. But the Compositor only serves as a
display for the timeline.
It may be best to remove the Compositor part.