Other best practices
Image dimensions
When you embed images in your content, always specify width and height. This allows the browser to start rendering the page before downloading the actual image, which speeds up page loading. CMS prepopulates the image dimensions automatically, so unless you want to change them, you don't have to do anything special.
Custom error pages
Sometimes your users will get a Page not Found error because they clicked on an outdated link or misspelled the URL of the page they were looking for. The "Page not Found" error is also known as a "404 error."
It's a good idea to create a custom 404 page for your site. On this page, you can refer your users to key pages on your site, encourage them to use search or a sitemap, and give them information on how to contact you about problems with the website.
To create a custom error page, click Add new in the Pages pane and select Error Page. In the Content tab, select Error code404 - not found, then create your content as for any other page. Note that you can also create custom pages for other errors, but Page not found is by far the most common one that your users will encounter so you can usually safely ignore the other options.
