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Layers, Channels, Transparency
#11
(02-05-2017, 01:53 PM)anon_private Wrote: The image of interest now has a transparent background. It looks fine in gimp. When I opened this file in Firefox the background appeared as grey - not transparent!

Well, somehow there is always something behind the transparency because they haven't invented fully transparent displays yet... So each image viewer has a default background for transparent things, and yes, Firefox uses a light grey.

(02-05-2017, 01:53 PM)anon_private Wrote: A couple of other questions:

The tool box has a feature to create ellipses. I expected it to form circles when holding down the shift key, but this action had no effect!

Start dragging, then depress the shift key. You ellipse will become a perfect circle.

(02-05-2017, 01:53 PM)anon_private Wrote: Is there a feature that creates solid coloured objects such as: spheres, arrows, lines, hexagons, etc.

In regular Gimp: Filter>Render>Gfig but IMHO it is barely usable

Once you have learned to use Paths:

  1. There is the "classic" shape-path script.
  2. There is my own ofn-path-to-shape which is discussed here
These are not the only two ones, there are half a dozen other shape generators scripts around.
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