From the Content Browser’s Search Bar, you can add some Filters by clicking the Filters button. The Filters list includes a list of Basic Assets and Other Assets which breaks out sub-menus for each category.
You may add as many filters to your current Asset View as you like. Filters are additive by nature, meaning that if you start by selecting the Static Mesh Filter, you will only see Static Meshes. If you then select the Blueprint Filter, you will see Static Meshes and Blueprints. Each Filter you add increases the number of available Asset types. Keep in mind that you can always see how many assets are currently visible in the lower-left corner of the Asset View.
You can also add all Filters under a given category of the Other Assets list by selecting the category itself.
By selecting the Animation category, all sub-categories under that selection will be automatically enabled.