Arranging : Time, Tempo, Meter, Key, and Chords : Change Meter : Change Meter Options

Change Meter Options
Options for the Change Meter command include:
New Meter
Lets you specify a new time signature. The first field lets you enter the number of beats (up to 99) in a measure, and the second field lets you enter the note length that counts as one beat.
Click
Lets you specify the note value that will trigger the metronome click. For example, if an eighth note is chosen, a click is played for every eighth note, regardless of tempo.
Starting at Bar
Sets the bar where the meter change is added. Meter changes made in the Change Meter page can only be made at the beginning of a bar.
Apply Change To
Lets you apply the meter change to the selected range, to the end of the session, or until the next bar.
Change
The Change fields let you specify the number of bars of the new meter that you want to have replace the selected range.
Pro Tools automatically calculates the nearest whole bar number, or you can specify a number of bars to be affected. Time is inserted or deleted, in whole bar increments, at the end of the selection, as necessary on all affected tracks when you override the calculated range.
Realign
The Realign controls let you choose which items to realign after a meter change has been made. You can choose to realign meter events, or choose to realign meter and tempo events, tick-based markers and tracks, and also all or none of the sample-based markers and tracks.
Meter Ruler Only
Applies the meter change and realigns only the Meter ruler. All other rulers and tracks are unaffected.
Meter, Tempo, Key, and Chord Rulers, all Tick-Based Markers and Tracks, and Sample-Based Markers and Tracks
Applies the meter change and realigns the Meter, Tempo, Key, and Chord rulers, and all tick-based markers and tracks. Using the pop-up menu, you can also choose to realign All or No sample-based markers and tracks. Time is inserted or deleted as needed at the end of the selection to preserve the alignment of material following the selection.