Most string trimmers has one of two mechanisms for advancing line: Bump feed, which advances line whenever you tap the head against the ground; and auto-feed, in which the line is released continuously. Not so with the Worx GT3.0 trimmer. Instead, it have what they call their own Command Feed system.

To make it work, you must become familiar with the system.
How the Command Feed System Works
First things first, you’ll want to take note of where all of the buttons is located. The handle actualy has a orange button that reads Command Feed right on it. This is your magic button for refilling line if it becomes too short.
No need to power down the machine and stop what you’re doing entirely. Simply be aware of how to operate it correctly.

Wrong order and the line doesn’t move.
The key is to press on the release lever and then it will unlock the head mechanism and allow the spool to turn freely. You has to hold that lever in to complete the process.
Next, while holding the lever down, you pull the trigger to engage the motor. The feed only works when the tool is running. It’s the motor that gives you the torque to force the line out.
After that, it’s time to feed. Hold down the lever and trigger, then repeatedly press the Command Feed button. Each time you press the Command Feed button, a small amount of line will come out of the head.
Again, this is all very controlled. This happens every time you don’t get a big wad of plastic dumped in your face.
You get just a small, manageable amount.
A little goes a long way
As the line comes through the head, it will cut itself off automatically and feed out. Once outside of the head, it’s trimmed by the rotating blade. No need to stop and reach down with scissors or a knife.

It trims for you right where it needs to be trimmed. And it does so in a way that is both safe and keeps your cutting length consistent. That helped a bunch on the initial few attempt.
After removing that excess line, you’re right back to regular trimming without delay. You don’t have to wait for the line to jam or settle. It’s a smooth transition back to cutting grass.
Dragging the trimmer head on the pavement is much messier.
No bumping is required.
There is nothing to bump.
So, after your line is worn out again, what do you do? Yep, that same thing. Hit the Command Feed button, press the trigger, open the lock. Nothing changes.

It doesn’t take much time to get used to it in real world situations. You’re not thinking about it half way through the yard. It’s more of a muscle memory exercise.
Overall it’s a good system that eliminates the guesswork of how many feet of line you are bumping. Press the button and get your 25-feet of line. Need more? Just hit the button again.
After the initial learning curve it’s intuitive. No jams, tangles, frustration…just simple direct control. It also maintains just the right amount of line for a cut, no excess hanging around.
The Command Feed system on this model is a sure winner. Forget about the bumps you have gotten used to with others. It is not like that on this one. The work is easy. It is good enough. The job is done.
Figured. No mess. That was easy.