To upload media files to an online service, select Gallery > Images & videos.
Select the files you want to upload, and Options > Send > Post to web.
To add tags to the post, scroll to the Tags: field, and press the scroll key.
To add a tag to the Tag library, select Options > New tag.
To select or unselect a tag in Tag library, select Mark/Unmark.
To select all tags in the list, select Options > Mark all.
To add the selected tags to the post, select Done.