To edit an existing post on your committee or dept page, the first essential step is to log in as a user.
There are two ways to update existing post.
Approach 1: Go to the Post, Then Edit
In this approach, once logged in, go to the information you want to edit. You'll see on upper right of that information, a pencil icon for editing. Click on the pencil. Then you'll see a tab for "Edit". Make your edits. Then Save. Your changes are now made and will appear in all the places they were found before.