# Configure Preferences

This tab of the Configure dialog specifies user preferences for YAAC.

The options that can be changed here are:

- The fonts that will be used for tabular displays and where a monospaced font would align the text more readably.
- Whether YAAC should beep when a priority or emergency message is received (it will always flash pointer arrows at the reporting station).
- Whether YAAC should flash yellow pointer arrows at a station reporting MicE Special status.
- Whether the map should auto-pan to center an emergency message reporting station.
- The units of distance (and speed) that will be used in the various tables and displays in the application.
- The units of temperature, pressure, and weight that will be used in the various tables and displays in the application.
- The amount of time that dead-reckoning should be done for a moving station or object until we assume that it is no longer transmitting data.
- The maximum amount of time that a track stripe should be drawn for a moving station.
- Whether the map background should be suitable for daytime viewing (light gray) or suitable for viewing in dim night-time conditions (black background). Note this feature is still experimental and does not apply to all views yet.
- Whether or not vicinity plotting should be used for stations that have not reported their own position. Vicinity plotting uses the location of the first station to hear the unlocated station over RF as a "hint" for locating the station with unknown position until that station announces its position. For more information, consult Robert Bruninga's whitepaper on the topic. Note this also enables approximate location of "stealth" digipeaters (those digipeaters that do not transmit their own position beacons, but use only digipeat path tracing to transmit their callsigns for legal identification). Stealth digipeaters are identified with the symbol until and unless they provide a beacon with a symbol of their own.
- Whether the transmitted beacon should automatically update its symbol to indicate whether or not the local station is manned by an operator, and how long the operator should be inactive before the station is considered unmanned. Note this only functions if the station symbol is from the alternate table (backslash "\" table ID) and is not already using an overlay (regardless of whether the overlay is for an APRS 1.2 extension symbol or not).
- Specify whether unlabeled and/or untyped OpenStreetMap data should be rendered at close zoom levels. Typically, these are building outlines with no identification of the purpose or name of the building. To render such data, the map tiles must be downloaded after enabling this option, so as to download the additional map data; if this option is not selected, the additional map data will not be downloaded and old copies of the data will be deleted.
- Specify whether OpenStreetMap labels should be displayed in English if the default language of the label is some other language and an English translation is available.
- Specify whether YAAC should try to automatically download missing pre-imported OpenStreetMap tiles from the author's website when the user views map areas needing the missing tiles.
- Whether the Sniffer table model should use the embedded timestamp of historical APRS messages to sort the messages, or always use the time of message receipt.
- Whether APRS Objects and Items created or taken over by this station should be preserved and resumed the next time YAAC is started.
- Choose the format for displaying latitude and longitude values.
- Choose whether the memory usage monitor should be displayed on the toolbar of the map window (not seen by default).
- Choose whether stations/objects specifically selected for motion-tracking should forcibly pan the map to ensure the current position of those stations remains visible.
- Choose whether the extended APRS 1.2 symbol set should be used for displaying stations and objects with overlay symbol table ID's. This also affect filtering by symbol for stations using the extended symbol set.
- Choose whether alternate table symbols can use illegal overlay characters. Currently, the Duchifat-1 satellite is the only part of the APRS network that not only allows illegal overlay characters, but requires them for a user identification; for all other usage, this option should be left disabled. For more information, see http://www.h-space-lab.org/php/duchifat1-en.php.