Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 404)

Creating graphic displays

11–111
dither colors (that is, alternate pixels of different colors to
approximate another color).
Do not use the Scale option
The Scale option in the Display Settings dialog box causes the
contents of a graphic display to change size to suit the size of the
graphic display’s window. To speed up the display of a graphic
containing bitmaps, choose Pan rather than Scale because bitmaps
take longer to draw when they are scaled to a size different from
their original size.
An OLE object can be a bitmap or a bitmap wrapped in a metafile.
These types of OLE objects will also draw more slowly when
scaled.
Avoid large bitmaps
Graphic displays that contain large bitmaps consume memory and
can be very slow to display because of the delay in loading them
from disk.
You can change a bitmap to a native RSView32 object by
converting the bitmap to wallpaper, tracing over the bitmap with
RSView32 drawing tools, and then deleting the bitmap.
Avoid many bitmaps
Whenever possible, create graphical objects using the RSView32
drawing tools.
When could a bitmap help?
Bitmaps generally make graphic displays slower. However, objects
with large amounts of detail, such as subtle shading, might draw more
quickly if converted to a bitmap because bitmaps take the same
amount of time to draw regardless of their complexity.