To edit a Showcase, click on your Avatar in the top right-hand corner and select “My Showcase”
Click on the title or image of the Showcase that you want to edit. Scroll to the bottom, and above comments you will see the Share options and a three-dot menu icon. Click the 3 vertical dots.
From the drop-down menu that opens, select “Edit item”.
From here, you will be brought to the editor used to create the Showcase. Make changes or add content as needed. Before clicking “Save” at the bottom, you may add a checkmark to post as an update if you are working on an ongoing Showcase, such as might be the case for projects, to alert your followers.
If you want to change the cover photo, click the 3 vertical dots again.
From the drop-down menu that opens, select “Set cover image”.
A popup will display the images within your showcase.
Click to add a dot to the one you want as the cover and click save.