import org.micromanager.navigation.PositionList;
import org.micromanager.navigation.MultiStagePosition;

xyStage = mmc.getXYStageDevice();
zStage = mmc.getFocusDevice();

PositionList pl = new PositionList();
gui.message(xyStage);
gui.message(zStage);
MultiStagePosition msp = new MultiStagePosition(xyStage, 1.0, 1.0, zStage, 100.0);
msp.setLabel("Test");
msp.setProperty("Slide","Number 1");
pl.addPosition(msp);
msp = new MultiStagePosition(xyStage, 4.0, 0.0, zStage, 98.0);
msp.setLabel("Next Position");
msp.setProperty("Slide", "Number 2");
pl.addPosition(msp);
gui.setPositionList(pl);