The Products in Category section lists the products that are currently assigned to the category.The search filters at the top of each column are used to add and remove products from the category.
<img src="/m2/ce/user_guide/images/images/btn-checkbox.png" class="button_height" />
<td>The checkbox in the header of the first column can be used to select or deselect all products. The control in the first row determines the type of search, and can be set to include any record, or only those that are either assigned or not assigned to the category. The checkbox in the first column of each row identifies products to be added to the category. Options: Yes / No / Any</td>
<td>The <a href="/m2/ce/user_guide/stores/admin-grid-controls.html">filter controls</a> at the top of each column can be used to enter specific values you want to either include or omit from the list, depending on the Select All setting.</td>
<td>Clears all search filters.</td>
<td>Searches the catalog based on the filter criteria, and displays the result.</td>