You can alter the shape, angle and size of raster points with the
Raster generator module. As this does not link to the Top row, the
only way to call up the module is to use the corresponding icon in the
Page module or the Print dialog. If necessary load RASTCACH.CXM first
External modules in the File menu.
First you will see the following dialog box in which you can set raster point options for the currently selected frame, the displayed page or the complete document. In addition you can also delete the raster for a frame or a page:
If you have not selected any frames, or have selected more than
one frame, the
Frame icon will be greyed out and not
selectable, of course. The same applies for the icons for deleting
rasters if a frame or the current page does not contain user-defined
The Raster generator can be switched off directly so as to use the ordered dithering printing raster incorporated into Calamus (ideal for inkjet printers):
To switch off the Raster generator, select the radio button
Always use ordered dithering., otherwise the Raster generator
will be used generally unless the output resolution is lower than the
value specified in the editable field of the lower radio button. So if
this is set to 601.000 dpi, for instance, output to a 600 dpi laser
printer would be dithered.
The present version of the Calamus Raster generator offers the
option to store the rasters that are generated for a printout in a
so-called raster cache. This cache will be saved automaticaly as a
file on the hard disk. If the same raster is required again, then the
Raster generator will recognise that it has already created it and so
does not perform the intensive raster calculations for a second time.
Instead it will use the
memorized raster from the cache. In
most cases this is appreciably faster.
The file with the created raster will be saved to the same folder
as the default raster (DEFAULT.CRI), which is loaded automatically
when Calamus is launched. This file (RCACHE.INT) can also be deleted,
of course; this will then destroy the
memory of the Raster
generator and the next creation of a similar raster will take some
time at first.
This mechanism can be switched on and off with the
cache checkbox, so – if you really want this – you can
let the raster be generated anew each time. This can be important if
many documents with different raster settings have to be output, as
with the cache switched on the RCACHE.INT file can become
Tip: Calamus's virtual memory should be switched on, if necessary, as otherwise the objects of the additional cache list occupy an unnecessary amount of RAM. If the virtual memory of Calamus is switched on, then the data will organize itself, namely in a way that only the most frequently required portions are held in RAM.