At the top of a conversation there is a new button close to a target.
https://storage.gra.cloud.ovh.net/v1/AUTH_91eb37814936490c95da7b85993cc2ff/tootfedilabapp/media_attachments/files/109/497/058/872/965/188/original/0dd5970f3b4165a3.jpg
If you are a beta tester using 3.10.1 a new button is available in threads. It will automatically open the thread in the remote instance like if you were using a Web browser. But if you want to interact with replies, the app will do that in background for you so messages can be known by your instance.
See media descriptions
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.