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The fifth section holds all values that determine the end of the computation
on one spot. There are two conditions that can trigger that. Either you run
out of iterations (exceeded the maximal interation I<count>). Please note,
that the actual number is the displayed number squared. This gives you a
wider range eof options and a little more comfort while changing the value.
When the computation runs out of iterations, the current pixel will get
the background  color. The second stop criterion is fulfilled when
the value exceeds the bailout limit (I<Value>), which is also the displayed
number squared. In the right corner you got ten different ways how to compute
the amount of z. Mathematicians call them merics. They mostly influence
the shape around the main shape (the crwon - corona).

=head2 Monomials

=for HTML <p>
<img src="https://raw.githubusercontent.com/lichtkind/App-GUI-Juliagraph/master/img/POD/Tab_Polynomials.png"    alt=""  width="630" height="410">
</p>

The second tab contains 4 identical sections which also work the same way.
Each of them stand in for a monomial of the iteration equation, but only
if the checkbox I<On> is marked. A second checkbox decides if this monomial
gets added or subtracted. The third allows you discard the complex factor
below the checkboxes. The fourth checkbox allows you to use the current
pixel coordinates as second factor in the monomial. Please be aware this
option can only be chosen if fractal type C<Any> is active and the I<Monomial>
checkbox in the upper right corner is on. Both of these settings are on
the previous C<Constrains> page. This might seem cumbersome, but I wanted
to make it very clear that this is no longer a C<Julia> fractal as most
people would understand it. The last and fifth checkbox lets you calculate
a complex logarithm of the power term z^n. This is useful when combined
with a very larg factor or another monomial. This just mentioned power
C<n> ca be chosen right beside the checkboxes. The higher this power is,
the longer it takes to calculate the picture, but it adds also a nice
rotational symmetry. C<Mandelbrot> has a (n-1)-times rot symmetry and
C<Julia> a n-times rotational symmetry.

=head2 Color Mapping

=for HTML <p>
<img src="https://raw.githubusercontent.com/lichtkind/App-GUI-Juliagraph/master/img/POD/Tab_Mapping.png"    alt=""  width="630" height="410">
</p>

This page is about mapping the iteration number at bailout to a color.
To be able to do that better you can preview here the color rainbow
between the first and second section. Below the color rainbow is another
this monochrome strip. It displayes the currently active background color.
The rainbow is from left (low iteration number) to right (high).

The first section starts with a checkbox. When deselected, the fractal
gets a gray scale. When selected all color choices are in effect. The
rainbow goes from begin color number to end color number over every color
in between. So if you for instance selected 2 and 4, the rainbow has a
gradient from color 2 to color 3 and a second from 3 to 4. The exact colors
will be changes on the next page. The gradients might vary dependant on
chosen C<dynamic> and color C<space> in which they are computed.

The second section is for people who want only a few color regions.
Just activate the custom checkbox and select the C<Steps> count. If they
are at 20 only 20 differently colored reagions are drawn. The readonly
textbox below with the current iteration max is only for better orientation.
When it is at lets say 60 you know: this scale of one to 60 possible
iteratons will be divided into 20 parts. If the distribution is I<linear>
they all have the size of three.  But you might want to skew the color
distribution. The mapping types are sorted by their skewness.

If the second section is deactivated you are able to activate the third.
It is for folks that think that the color gradient is not dense enough.
That might makes sense if the iteration already stops at maximum of 5
but you want to get a long smooth gradient. Then you want to I<Activate>
subgradients, based on the Value at iteration stop. The greater that is
the further on the subgradient the resulting color will be. The five
options here parallel what we already described. Subgradients will have
the amount of steps as dialed in under C<Steps>. The gradient will be
computed from 1 (above bailout value) up to the C<Size> value. Everything
above just lands in the last bucket. The subgradient can again be skewed
by a C<Distribution> and C<Dynamic> value (as described above). Also
the resulting color change dependant in which color C<Space> it is
computed in. I<RBG> gives usually more smooth results and I<HSL> more
contrast.


=head2 Colors

=for HTML <p>
<img src="https://raw.githubusercontent.com/lichtkind/App-GUI-Juliagraph/master/img/POD/Tab_Color.png"    alt=""  width="630" height="410">
</p>

This page helps you to select the color that will be used to paint the fractal.
You can see them in the middle row.
The background color is often the one at the most left.  That is why it
is marked by a vertical bar. The colors are numbered from left to right
with 1 to 11.

The first section on the pages is for loading and saving custom sets of
colors. Please use the delete button carefully. C<New> saves the current
colors under a new name, C<Save> under the current name. There are no
undo buttons yet.

The section below helps you to compute related colors beweet the second
and the currently selected. This can be either a gradient (with C<Gradient>
button). Right beside is a text box to skew the gradient in one or anotehr
direction. To get complementary colors push the C<Complement> button.
This also can be skewed on the saturation and lightness axis (text boxes
beside). The arrow butons there help you to move colors to another position.

To change a color you have to fist select it by clicking on it or the
marker below. After that the marker turns into an arrow pointing down.
Because below are the 6 slider to change the either RGB or HSL values
of the color. Each slider has a randomize button with a quastion mark.

The second method to change the selected color is to load one from the
store (last section below). Just select the color by drop down menu or
arrows. If you like the seen color push C<Load>. This single color store
has also Buttons to store your own favorite colors or delete the ones
you dont like. The only way to bring back deleted default colors is to
delete the config file:  ~/.config/juliagraph.


=head2 Mouse

The drawing board responds to three types of clicks. A left click moves