One look for the whole deck
Pick a theme and make it yours for this deck, then give each slide a layout. Change a layout and the slides on it follow.
Four themes
Plain, Bold, Editorial and Pitch. Change this deck's copy of its theme: its eleven colours, its heading and body fonts, and its background.
Colours that follow the theme
Text and shapes in the theme's colours change with the theme, and charts use them too. Colours you pick yourself stay as they are.
Layouts
Title, Title and Body, Section, Two Columns, Title Only, Blank, Caption and Big Number. Give a slide another layout and its title and text move to the new places.
Edit the layouts
Move and resize a layout's placeholders, and the slides on it follow, except what you've moved by hand on a slide.
And for every slide
Backgrounds
A colour or a picture for one slide or for every slide, or back to the theme's.
Slide size
Widescreen or standard, with everything scaled to fit.
Grid view
Every slide at once, to reorder and pick from.
Skip a slide
Leave a slide out when presenting, while it stays in the deck.
Make your next presentation in Slides
Every Business plan includes it, with Documents, Sheets, Drive and the rest of your workplace.