To replace an image in your publication, you must be in editing mode.
Select the image you want to replace.
Click ⛭ to open image properties.
Tip: You can also open image properties via Element settings on the properties toolbar.
In the opened panel, do one of the following:
Click Change file to upload a new image from your device.
Click Select from library to choose from previously uploaded images.
Select the new image and click Update.
Save the changes.