Gimp - 2.2 Guida Utente Pagina 106

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CHAPTER 12. DIALOGS 105
12.33 The Error Console Dialog
The Error Console will show internal GIMP error messages. An example of such an
error is when GIMP fails to save or load an image.
If you encounter a bug in GIMP, it can be wise to open the error console and try
to reproduce the bug. If GIMP then produces any error messages, you can email
[email protected] the message along with a bug description to the GIMP developers at
12.34 Undo History
Shows the history of your image editing along with thumbnails. This makes it very easy
to jump back and forth in the command history.
Always use Undo History when you work on hard and difficult tasks. It is a
whole lot easier to jump ten steps back just by clicking in the Undo History
dialog than doing it with
Ctrl
Z .
12.35 The Standard GIMP Color Selector
You can change the color manually by clicking on a hue in the spectrum color field to the
right, and then dragging the cross in the large color box on the left to the exact color you
want. If you want a specific RGB (Red, Green, Blue) or HSV (Hue, Saturation, Value)
color, type the exact value in the HSV or RGB parameter fields or drag the sliders to
specify a color.
The H (hue) channel is displayed in the color fields by default when you open the
Color Selection dialog. However, you can choose to search in another channel for the
color you want. It can be very useful to change the channel to S (saturation) or V
(value) when you’re searching for a specific color. The color spectrum will be displayed
in a quite different way by doing this and you might find it more useful.
In the bottom of the dialog you will find the current color specified as a hexedecimal
triplet. The function is targeted at web developers to get the color code into your
HTML document simply select it and paste it in with your middle mouse button. If you
are using GIMP FOR WINDOWS you must use
Ctrl
C and
Ctrl
V to achieve the
same result.
12.36 The GTK Color Selector
The GTK Color Selector is similar toGIMP’s standard color selector. The main difference
is that you can’t select in which color space you want to work. The left color bar is always
working in value mode and you can alter the hue and saturation by dragging your mouse
in the circle.
Another difference is that the RGB values are represented in percent instead of
values from 0 to 255. 100% (1.0) is 255 and 0% (0.0) is 0. The fact is that you should
see it as the amount of e.g. red that you want to mix into your color.
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