Song Info

Use the song info section to manage the song's metadata, transpose the song and specify a backing track. The song info window is part of the side panel of the song editor. (If the side panel is not visible tap/click on the vertical bar at the left side of the screen.)
Tap/Click on the icon in the upper right corner of the side panel and select 'Song Info' from the pop-up menu. 
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Song Title & Subtitle
Enter a song title and subtitle to be able to identify the songs in your song catalog. (Newly added songs without a specific title will be listed as 'Untitled' in the library panel.)
It is common practice to use the artist's name in the 'Subtitle' field. 
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Original & Transposed Key
Song One can automatically identify a song's key based on the diatonic chords of the song. (Key changes within a song are not recognized.)
Tap/Click on the magnifying glass to the right of 'Original Key' to automatically specify the current key of the song.
You may manually type in the values of the 'Original Key' and 'Transposed Key' of a song. (Manually entered values will not affect the song's chord symbols or its chord diagrams.)
Tap/Click on the circle icon to the right of 'Transposed Key' to transpose a song and automatically update its chord symbols and chord diagrams. (See Transposing Songs to learn more.)
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Tuning
This field shows the tuning of string instruments. You may type in up to eight pitches (separated by spaces). The song's chord charts will be automatically updated whenever the tuning is changed.
Use the virtual fretboard instead of this field when you wish to specify the octave in addition to the pitch. The virtual fretboard updates the tuning field automatically whenever the tuning is changed.
 Specify a default value for the tuning field (and the virtual fretboard) in the settings (preferences).
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Capo
Enter a number between 1 and 11 to specify a capo position. The song's chord chart will be automatically updated whenever the capo position is changed.
Tap/Click on the power icon to the right of the 'Capo' field to disable the capo temporarily.
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Tempo
Enter the song's tempo in 'BPM' ('beats per minute'). The entered value will determine the speed of the metronome. 
Alternatively tap/click on the tap icon in the desired speed to have Song One determine and fill in the tempo for you:
Changing the 'Tempo' value will not influence the scrolling speed of the lyrics during playback. (Change the value in the 'Duration' field to adjust the scrolling speed.)
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Pitch Tone
Pitch tones may be used to guide singers in 'a capella' performances or to tune your string instrument. Song One generates pitch tone(s) from note(s) you entered into the song info section. You may enter a number between 3 and 8 immediately after the note to specify its octave. Separate multiple values using spaces (multiple pitch tones are played in succession).
Tap/Click on the sine wave icon to play the specified pitch tone(s). 
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Backing Track
Song One can automatically play an audio backing track whenever the play mode is activated. (This section provides a brief overview on backing tracks: see 'Audio Backing Tracks' to learn more.)
To add a specific track tap/click on the audio wave icon to the right. A file browser will appear to allow you to select the appropriate audio file for the current song.
Once a backing track has been chosen it will be linked to the current song. This will enable the automatic playback of the audio file when the lyrics are auto-scrolled. (See play mode to learn more.)
Song One supports the linking of 'Apple Music' songs provided they are downloaded to your device.
Tap/Click on the chain link icon to mute a backing track when the lyrics are auto-scrolled. The icon will change into an open chain link icon. (Tap/Click on the open chain link icon to unmute the linked backing track.)
Tap/Click on the play button to activate Song One's play mode. 
A backing track will not be played if Song One is unable to locate the original audio file. A broken chain link icon is shown. (See 'Audio Backing Tracks' to learn how to fix a broken link.)
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Duration
The duration is the length of a song in minutes and seconds (mm:ss). In Song One it represents the time it takes to auto-scroll the lyrics from the beginning to the end. In most cases this time frame is identical to the playback duration of an added audio backing track. 
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Tap/Click on the play button to activate Song One's play mode. 
When adding a backing track the duration is entered automatically. Change it manually to adjust the scrolling speed if needed.
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Time
Tap/Click on the three dots below 'Time' to specify the time signature (tempo) of the song. The time signature represents the meter of a song in beats per measure.
The beats per measure value is expressed in two numbers separated by a slash. The first number represents the number of beats in each bar. The second number represents the note value that is equivalent to the beat (e.g. 2/4 means two quarter-note beats per bar).
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Subdivision
Subdivision refers to a song's time signature (see above) divided into smaller units. This allows you to keep accurate time when performing a song. For instance, a time signature of 2/4 is divided into eighth notes (the duration of a quarter-note halved). 
Tap/Click on the three dots below 'Subdivision'. A pop-up menu will appear to allow you to select the desired value.
To enter a custom value tap/click on the three dots (or an already entered value) a second time.
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Copyright & CCLI
Enter the copyright info and CCLI license number of the song by tapping/clicking on the three dots. This information is automatically added to the lyrics provided you have set the appropriate CCLI and copyright tags. (See section labels/tags to learn more.)
CCLI (Christian Copyright Licensing International®) issues copyright licenses for churches covering the projection and printing of songs for congregational singing. These licenses require the issued CCLI number to be displayed on the projected/printed songs. Consult CCLI guideline (www.ccli.com) for more details.
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Standard Metadata
Tap/Click on the three dots below the following standard categories to enter the appropriate values. (Tap/Click on the stars below the last category to rate the song.)
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Values entered into the song info fields are searchable when browsing your song catalog in the library panel. (See 'View Options' in library panel to learn more.)