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"The elevators are movable panels at the rear edges of the horizontal stabilizers, and are moved to adjust the angle of attack

Do the "trim tabs" help the pilot fine-tune this function?

[Atlas Sneezed]

“The elevators are movable panels at the rear edges of the horizontal stabilizers, and are moved to adjust the angle of attack

Do the “trim tabs” help the pilot fine-tune this function?

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Yes. When a plane is flow faster than it’s normal speed (like in a race) it has more lift, so will tend to fly up instead of level. Instead of having a pilot pressing forward on the stick during a race to maintain level flight, the trim tab is set to provide level flight at a higher speed.

If this trim tab were to break off, it would be like a sudden input pulling back on the stick, possibly beyond the physical limits of the airframe or pilot.