Here is how to reschedule a message in slack
- First click on "Drafts & sent" option in the sidebar
- Then click on "Scheduled" tab in the top menu
- Next click on the "Reschedule message" button
- Then click on the date dropdown in the schedule message modal
- Next select a date from the calendar picker
- Then click on the time dropdown in the schedule message modal
- Next select a new time from the dropdown menu
- Finally click on "Schedule Message" button to confirm








