First you need to add a 'Newsletter' block to the 'Footer' section:
Any customers who sign up will have an account created for them in Shopify.
Then you can use the free Mailchimp app: https://apps.shopify.com/mailchimp and have it automatically sync each new user with your Mailchimp list.
For changing the font family go to the Theme Editor > General settings > Typography > Heading font or Body text font.
You can change the language of the text of the theme at: California Theme Editor > Theme actions > Edit Languages > Change theme language.
Yes. You can change the colors easily at: California Theme Editor > General settings > Colors.
You can edit the home page text at: California Theme Editor > Sections > Slideshow > Content.
There is also some theme's text inside California Theme Editor > Theme options > Edit Languages.
You can hide the home page pitch at: California Theme Editor > Sections > Text columns > Delete section.
You can edit the text in California Theme Editor > Sections > Header Hero Slideshow > Content > Image slide > Tagline
Then just use the html tag:
where you want to have the line break at your home page tagline.
For example, at this store, we are using: "The best thing <br>since plastic flowers".
You can show the latest blog posts at: California Theme Editor > Sections > Add section > Blog posts.
Go to the theme editor and click on "Slideshow":
Then scroll down to the bottom of the Slideshow editor options and choose "Add image slide":
Then just set all the slide options, including the image for the background.
You can change the home page logo at: California Theme Editor > Sections > Header Hero Slideshow.
There is no recommended size as those images fill a background space that changes depending on the browser window width and height.
The theme already includes code that resizes the image to optimize the image to those different resolutions.
So the guidelines here are two:
If you follow those two guidelines then you will be fine.
First you need to go to the theme editor and navigate to a page that includes the header. Then: California Theme Editor > Sections > Header > Logo.
You can show to your customers each products available stock with: California Theme Editor > Navigate to the product page > Sections > Product page > Inventory > Show available stock units.
For adding the Product Review App (https://apps.shopify.com/product-reviews) in the products page follow the App instructions until you get the code snippet to insert in your store.
Then go to the theme editor > Edit code, and choose the "Snippets" folder:
And open the "product.liquid" file:
Then insert your code snippet after the product description, that's around line 150:
Save the changes and that should be it.
You can change the amount of products showing on each collection row at: California Theme Editor > Navigate to a Collection page > Sections > Collection page > Products per row. You can choose between: 1 and 6 products per row.
Access your store's admin page and on the left nav go to Online Store and then Navigation. Click the "Add menu" button and create a new menu with title "Featured collections" (it's important you use exactly this same words). Then on the Menu items section start adding all your collections in the desired order. It's important all the links on this list have the "Link" option with the type "Collection".
At that should be it. Automatically the theme code when rendering your collection list will pick this navigation menu and render the collections you have added to that list.
When editing the content of the page, change the template suffix to: "page.expanded".