To upload an image:
1. drag an image tool onto the canvas.
2. click "Add media" button and select a file from your computer.
3. fill in something in the name and copyright fields.
tips:
• To make the image show in full size when you click on it:
Go to options tab > settings and select "ON CLICK OPEN IMAGE IN POPUP" option.
• Drag the green box around the image tool to resize the preview image.