You can add images and videos to your presentation by editing the section background. You can do this by uploading files from your computer or saving an external asset. You can learn more about external assets here.
Detailed description:
After you hover the cursor over the particular section, buttons will appear in its upper right corner: „Delete,” „Duplicate,” „Copy,” and „Section Settings.” Clicking the „Section Settings” button will open the section settings
Find „Background Media” in the right toolbar at the bottom, above „Background Audio”
Click the „Add Media” button, and the „Media Library” will open
You can add a graphic element as the background of your presentation in the following ways:
By selecting your previously uploaded files in the „Uploaded Assets” section of the „Media Library”
By selecting your previously uploaded files in the „External Assets” section of the „Media Library”
By uploading a new file from your computer in the „Uploaded Assets” section of the „Media Library” – by clicking the „Add Asset+” button
By uploading a new file from your computer in the „External Assets” section of the „Media Library” – by clicking the „Add External Asset+” button