Add a logo to the top bar (visible across the story)
In the editor, click the Settings (gear icon) in the top toolbar.
Open the Engagement Bar panel.
Under Company’s Logo, upload your file.
The logo will now always appear in the top bar as readers scroll through your story.
Add a logo to a specific slide
Select the slide from the left panel.
Click Add Element → Images → Logo.
Upload your file and adjust size and placement on the slide.