Question

how can you preview your entire slideshow before presenting it?
select \slide show\ and then \from beginning\
select \layout\ and then choose \preview\
right - select and chose \preview\
double - select each slide to view it

Explanation:

In common presentation software (like Microsoft PowerPoint), the standard way to preview the entire slideshow is through the "Slide Show" tab. Selecting "From Beginning" in the "Slide Show" tab starts the preview of the whole presentation. The "Layout" option is for formatting slide elements, right - selecting usually gives context - specific menu options (not for full - slideshow preview), and double - selecting each slide would only view individual slides one by one, not the entire show as a sequence.

Answer:

select "Slide Show" and then "From Beginning"