View option: Small box appears before track? [SOLVED]

[SynthVox]

In Logic Pro 9, a small box appeared before track.

 

I just noticed this, is this an issue? Is there a way to resolve this:

 

screenshot:

 

I didnt notice this before now, this doesnt look normal.

 

Thanks

[Scott Jackson]

Looks like Control Surface Bars. Control+Click the Track Header and select Configure Track Header. Uncheck Control Surface Bars.

[Atlas007]

Did you install a MIDI Control Surface lately?

If so this is normal.

These lines indicates which track your controller are currently assigned to affect.

You can change their color in the Control Surface Setup window.

If not, go check in the Control Surface Setup window. Logic may have unduly installed a MIDI Controller automatically.

That could be caused by some MIDI feedback or other MIDI interference triggering a false detection of MIDI controller presence, thus causing its installation.

If you Bypass all Controllers, you will normally see these edge lines disappear.

In case of a false detection, to solve the problem, you could delete that unduly installed Control Surface directly from the Control Surface Setup window. Select its icon, then press the Delete on your computer keyboard. It would be worthwhile to troubleshoot your MIDI hardware setup if the problem occurs again in order to prevent it...

[SynthVox]

I followed your instructions and now it has disappeared, thanks very much