Default Settings

The Default Settings page accessed through File | Defaults controls most of the default settings used throughout MapViewer's dialogs. These settings are saved within a setting file [.SET], and are reloaded whenever MapViewer is started. Using the hierarchical list in the Default Settings page, you can customize each default setting independently. This is an advanced feature so the settings should not be changed indiscriminately. Minimal error checking is performed so it is possible to specify values completely inappropriate for some data sets.

The Current setting file is the file MapViewer is currently using to extract the default settings. Any changes made to the default settings in the various dialogs are saved in the current setting file when MapViewer is shut down. By default, MapViewer uses a file named MAP.SET. It is also possible to specify a different setting file by clicking the $image\open2.gif$ button.
The Settings list displays the default settings organized hierarchically by dialog. To change a setting, click the + button next to the dialog you wish to modify. Individual settings can be highlighted by clicking on them or by using the up and down arrow keys. As each individual setting is highlighted, a brief description appears in the text box at the bottom of the dialog.
Enter the new value of the default setting in the Setting value control. This control changes depending on the type of setting highlighted in the Settings list. Numeric values are entered into a box. Settings with a discrete number of choices are displayed in a list. The values entered in this control are not checked for errors so be sure to specify an appropriate value for the highlighted setting.
All settings have a value called Internal Default. This is a special value which indicates that MapViewer should use whatever it thinks is best for the current setting. If the Setting control is a box you can specify the Internal Default value by deleting the contents of the box so it is empty.
Several default settings require the value to be specified in a particular format. The type of format required is determined from the comments at the bottom of the Default Settings page. See the Formats for Attribute Values topic for a list of these special values.
The Setting persistence option specifies how the settings are updated when you change the setting during normal operation. The options are:

Always reset	Do not update the default setting when it is changed in a dialog. Every time the dialog is invoked, the setting is reset to the value in the setting file.
Current session only	This option saves changes made to the setting within the dialog during the current session only. The settings are not written to the setting file and are not used the next time MapViewer is started.
All sessions	This option saves the changes made to the setting within the dialog during the current session and writes the changes to the setting file to be used the next time MapViewer is started.

You must click the OK button in the dialog that uses the setting for the setting to be updated. If the Cancel button is clicked, the dialog the changes are not recorded in the setting file.