[scribus] Image to frame "spacing"

[Ken Springer]

Scribus 1.5.2

When using text frames, you can set an "internal margin" on a frame that 
keeps your text from running into the cell boundaries.

How can you simulate the same effect in an image frame.  I didn't see 
anything in Properties or the menus that will let me do this.

I can change the image itself to get what I want, but that doesn't seem 
to be the most efficient way of accomplishing my desired output.

The Manage Images option for editing the image will not work for me, as 
I do not use GIMP.  And, GIMP is way overkill for simply increasing the 
size of the canvas.

Is there anyway to do this within Scribus?  Changing the image to make 
small changes is labor intensive compared to what you can do in a text 
frame.

-- 
Ken
Mac OS X 10.11.6
Firefox 49.0.1
Thunderbird 45.3.0
"My brain is like lightning, a quick flash
      and it's gone!"