You can configure the way your products are displayed at the main Products page. Please find the following fields at the end of Products Toolbar:
You can adjust columns width by clicking on the first icon. Second icon expand and collapse products when "Show all grouped" Filter is chosen. You can make your own filter or use "Filter by selected category" option (see picture above). Also you can Delete product Filter that are set
Filter option is actually the one that is responsible for the products' view on the page. You can select from two filter types, specified in a drop-down:
Filter by Selected Category
You can see all products from the category you've selected in the Categories section. No additional sorting options are available, only standard column sorting.
Show All Grouped
You can see all products that belong to all categories. The first special feature of this filter type is that a Category column is added to Products section. You can also see a gray box on top of all columns that says: "Drag a column header here to group by that column".
Whenever you drag any column header there (Category header grouping is shown below), products will be grouped in categories by this selection:
You can Expand/Collapse any category by double-clicking on it. When any category is opened, you'll be able to see full product description. You can also use Expand all/ Collapse all products buttons on the main Products toolbar
There's also a possibility to build a "category tree" using this filter type. Let's say you want all your products grouped by Category and each Category by different Price. Than simply drag Price header into the grey field and drop it behind Category Field. You can also set Price as a category with Category subcategory, just drop Price ahead of Category Field.
When you drag column header back it will be placed between the columns where you drop it.