"Moving on now to ..." is a signpost used to give an example or explanation, outline the structure of a presentation or move from one part to another part in a presentation
To move from one part to another part in a presentation
"I would like to begin by …" is a signpost used to introduce a topic, outline the structure of a presentation or move from one point to another point in a presentation
A signpost used to introduce a topic
"Let's now turn to..." is a signpost used to give an example or explanation, outline the structure of a presentation or move from one part to another part in a presentation
To move from one part to another part in a presentation