You can apply timing to a channel, which is known as "Discrete Timing".
This is represented by a lower case "t" in the bottom right corner of the channel.
To check what timing is currently set for that channel press and hold the [About] Key and press [Time].
This will show information on what timing is set for that channel.
[About]+[Time] is for software versions 2.6.x and later. For older software versions, use [Shift]+[Time] could be held to view discrete timing.
If you would like to remove discrete timing from a channel, simply select that channel, and give it a blank value for time.