Free Hero Mesh

  square in order for this to work.

F2
  Rotate marked area counterclockwise by 90 degrees. The marked area must
  be square in order for this to work.

F3
  Flip marked area verticaly.
  Flip marked area vertically.

F4
  Flip marked area horizontally.

F5
  Resizes the current image variant. It will ask for the size; enter a
  number from 1 to 255 to set the size (which is always square), and then

For clicking in the palette or the Pick mode, with the middle or right
mouse button, you can also push CTRL or SHIFT keys with it in order to
affect only odd or only even coordinates.


=== Dependent pictures ===

A depedent picture depends on one or more independent pictures. It
A dependent picture depends on one or more independent pictures. It
consists of any combination of the following items, in any order:

* Base: This one must come first, and is the independent picture which
will be used as the base; all other filters are applied to alter it.

* Flip/rotation: Flip/rotate the picture. "Identity" also belongs to this
category, but ahs no effect.
category, but has no effect.

* Replace colors: A list of pairs of colours. The first of each pair is
the old colour, and next the colour to replace it with.

* Advance colours: A list of colours; change each colour mentioned in the
list into the next colour in the list after that one.

* Exchange colours: A list of pairs of colours; each colour is changed to
the other colour in the pair.

* Overlay: Paste the specified independent picture over the current
picture, showing through wherever it is transparent.

* Shift: Shift the picture. Specify the sizes and shift amounts in the
format "size: shift"; each size also affects all multiples of that size,
in which case the shift amoutn is also multiplied by the same amount.
in which case the shift amount is also multiplied by the same amount.