private void updateLocation() {
		if (currentLocation != null) {
			int opIndex = instrPanel.getSelectedOpIndex();
			if (opIndex == MNEMONIC_OPINDEX) {
				currentLocation = new MnemonicFieldLocation(currentLocation.getProgram(),
					currentLocation.getAddress(), currentLocation.getComponentPath(), "", 0);
			}
			else {
				currentLocation = new OperandFieldLocation(currentLocation.getProgram(),
					currentLocation.getAddress(), currentLocation.getComponentPath(), null, "",
					opIndex, 0);
			}
		}
	}
Size the columns such that the interesting ones are wider than the
uninteresting columns.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/references/EditReferencesProvider.java