Features

Choose the position of the Title and Subtitle (VTop,VMiddle,VBottom, HRight, HLeft, HMiddle)

--------------------------------------------------------------------
|vtop/hleft                 vtop/hmiddle                vtop/hright|
|                                                                  |
|                    ^                                             |
|                    |                                             |
|                    |                                             |
|                    |                                             |
|                    |                                             |
||vmiddle/hleft     y|    vmiddle/hmiddle            vmiddle/hright|
|                    |                                             |
|                    |                                             |
|                    |                                             |
|                    0---------------------->                      |
|                                x                                 |
|                                                                  |
||vbottom/hleft          vbottom/hmiddle             vbottom/hright|
--------------------------------------------------------------------

Give more control on the axis titles:
- Position: inside/outside

           ^
           |
Y(outside) | Y(inside)
           |
           |     X(inside)
           o----------------->
                 X(outside)

- Position min/middle/max

       Y(max)   ^
                |
                |
                |
      Y(middle) | 
                |
                |
       Y(min)   o------------------------------->
                X(min)     X(middle)           X(max)

- Rotation: horizontal/vertical/oblique/auto/3D

> threshold ? Vertical : Horizontal

3D: text orientation = axis orientation

- Label font size:
  - Fixed (in px)
  - Relative to Viewport (see vtkTextActor)
  - Relative to Axes
- ?Spacing between label and axes?
  - Adjust the positions of the Y labels so that they don't overlap with the chart
- Style:italic/bold/shadow/color/?antialiasing?...
Feature: Add a grid 9007
Feature: Add more axis ticks 9007
Support subscripts:
- how ?
  - ?Qt overlay?
- FTGL currently supports Unicode fonts