Here are some quick thoughts on the positioning of common elements on a web page:
- Home button in or near menu on far left on all pages except the homepage
- Logo in the upper left corners of all pages
- Open search field in upper right of all pages
- Log in/out upper right of all pages
- Shopping basket icon upper right of all pages
The above highlights the most common areas of placement for particular elements on a website. As such users expect to see them there. Following these design trends helps users feel comfortable/familiar with how to use the website and allows them to get on with their desired task.
