The Advanced Settings pane (if this tab is not visible
see
Additional views) provides
the following options:
Limit Overview
Repaints
Limits the Overview
pane to not more than two refreshes per second to reduce CPU usage.
When you are zooming or manipulating the main view, it is not always
necessary for the Overview pane to be refreshed as often of the main
view. This option is set by default.
Default
Tile Release
Determines
the way image tiles are kept in memory or dumped on the hard disk
cache area (tiles are parts of each image). This determines what happens
when you pan or zoom the map. To improve performance, already-computed
images are stored in the cache ready for when you pan or zoom back.
This value represents the number of tiles kept in memory, not the
size in KB or MB.
The following figure shows how the caching mechanism
works.
Show Tile
Debugging View
Displays
a view of the existing tiles for debugging purposes.
Activate
Garbage Collection
Activates
a timer that periodically cleans as much unused memory as possible.
Memory
Usage and Refresh
Displays
the memory used by the application and the refresh rate (in seconds)
for the redisplay of images.
The following figure shows an example of the Advanced
Settings pane.