The "Media / Images" Special Folder
You can insert a picture by going to Insert > Images in the main menu, context menu (right mouse click within webpage edit area) or the toolbar. You can edit its properties at any time by double-clicking on it.
The inserted pictures are stored in the "Media / Images" special folder (see website structure on the left).
If you want your image to be opened in a popup window or displayed in full screen you should create a link to that image.

You can place an image anywhere on the page using the concept of absolute positioning. You can also insert an image into the non-editable part of the page by entering negative values for the Top and Left properties.
You can also insert a background image.