Signal to add pinned messages feature for chats on all platforms

Signal is developing a pinned messages feature for chats, which will be available on Android, iOS, and Desktop. Pinned messages have been confirmed to AboutSignal.com and will be available in both one-on-one and group chats, displaying selected messages at the top of the chat for all participants. Early evidence of the feature has appeared in Signal's iOS source code, however, no release date has been provided yet.