Enter the query in the search field and click the enter key or Search button to display the search results.
See Search in Slack for query details.
Example 1: Search for posts on the #general channel
Example 2: Search for posts before 7/15/2020
Search results are displayed in chronological order in the left panel.
Drag and drop any post from the left panel to the right panel and pin it.
Change the order of the pinned posts by dragging and dropping.