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doc/help/Scan

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+scan -- examine or change the scan list
+
+syntax:  scan [-r<string>] [-a<string>] [-z]
+
+ex:      scan
+         scan -z
+         scan -a /ram
+         scan -a *
+         scan -a .61
+         scan -a .62utils
+         scan -r /hard2/sys/
+
+With no options, prints the list of directories Davex scans when 
+you type something that isn't an internal command.
+
+Use the -a and -r options to add or remove a paths from the list.
+
+The special path '*' in the scan list tells Davex to scan the
+directory your prefix is set to.
+
+Use 'scan -z' to reset the scan list to the default (the default
+is "%" followed by "*").
+
+Note:  If '%' and '.##' shorthand forms are used in the scan
+list, they are expanded during scanning, not when they are entered
+into the list.  This lets you specify that Davex should scan
+certain _drives_ (or directories on whatever volumes are found in
+them) rather than certain volumes.