Once an image has been uploaded and added (see "Uploading an image"), its image properties can be modified.
Editing Image Properties:
Edit content
Double click the image in the field OR right click the image and select "Image Properties".
Resizing the image
The image can be resized by typing values into the "Width" and "Height" fields. If the padlock icon is locked, the image proportions will be retained as values are changed. The circular arrow resets the image to the original size.
...
Padding
Padding or spacing can be modified by typing values in the "Hspace" and "Vspace" fields.
"Hspace" will change the horizontal spacing
"Vspace" will change the vertical spacing.
Borders
A border can be added by typing a value into the "Border" field. The value will be the thickness of the border. For example, typing in "2" will create a 2 pixel thick border.
...