You can enable users with download original permission to select, using checkboxes, assets on the search results and browse results pages that they would like and download them directly (bundled up as a zip file) using the 'Download' button. When this functionality is enabled there is also an option to select all assets in the search results or category and download them all.
To enable this functionality set the download-selected-limit setting to a value greater than 0. The selected value will be the maximum amount of assets a user can select from either page and download at once. We normally recommend that the setting is set to 100-200 assets to prevent too much memory usage or load on the server from download conversions.