### Setting TQSL Log Handling Options

To inspect or change TQSL's log handlling options, select the File menu's Display or Modify Preferences... command (on OS X, select the Application menu's Preferences command) to display its Preferences dialog; this dialog's Log Handling tab provides control over several settings that govern TQSL's log signing operations:

- Specify ADIF and Cabrillo File Extensions
- Allow Nonamateur Callsigns
- Prompt for QSO Date Range
- Display details of already uploaded QSOs when signing a log
- Specify how to handle QTH details in ADIF logs

##### Specify ADIF and Cabrillo File Extensions

Because there are no standard file extensions (.XXX) consistently used for ADIF AND Cabrillo files, TQSL lets you specify the extensions used on your system for each file types. The Select File to Sign and Upload and Select File to Sign and Save dialogs set their Files of type selectors based on the extensions specified on this tab:

In the example shown above, files whose names end in `.log` or `.cab` will be treated as Cabrillo files, while those with names ending in `.adi` or `.ADI` are ADIF files. When using an operating system like Windows that doesn't distinguish case in file names, the two ADIF entries shown in this example would be unneccessary.

##### Allow Nonamateur Callsigns

The Allow nonamateur call signs checkbox lets you to choose whether TQSL should treat a nonamateur call-worked as an error. An amateur callsign must meet these requirements:

- contains only the letters A through Z, the digits 0 through 9, and the slash character
- contains at least one number and one letter
- is at least three characters in length
- does not begin or end with a slash character
- does not begin with 0
- does not begin with 1 unless it begins with 1A, 1M, or 1S

LoTW will not accept a QSO whose callsign does not conform to the above requirements so you should leave TQSL's Allow nonamateur call signs box unchecked.

##### Prompt for QSO Date Range

This checkbox determines whether TQSL will display the QSO Date Range dialog when Submitting a Log File to LoTW via the Internet or when Submitting a Log File from a Computer without Internet Access.

The QSO Date Range dialog can be used to prevent QSOs already submitted to LoTW that haven't been subsequently modified from being submitted again, sparing LoTW from processing QSOs that have already been processed.

##### Display details of already uploaded QSOs when signing a log

If, when signing and uploading a file or signing and saving a file, TQSL encounters QSOs that have already been submitted to LoTW, then if this box is checked the details of each already uploaded QSO will be reported in the Status Log; if this box is not checked, no details will be reported.

##### Set options for handling QTH details in ADIF logs

If, when signing and uploading a file or signing and saving a file, TQSL encounters station information in the log that indicates callsign, DXCC entity, or QTH information such as gridsquare, zone, state, etc. TQSL can verify this against the Station Location and either report on or update the Station Location with the information from the log. This set of options allows either ignoring, reporting on, or updating the Station Location using the log data.