I do sometimes have trouble seeing something that is right in front of my face. Sorry. Please say how to search on this forum. Thanks so much.
To search ALL forums click on the top left hand Xojo icon until you see the list of Channels at the top of the page.
The search box in the upper right (where it says Filter Conversations) you type your search terms into.
If you want to search in one Channel only then go into that channel and use the filter mechanism.