New to 3D Printing got my Flashforge Creator Pro 2 weeks ago, having a great time learning how to use, just notice when printing the 20mm cube my micrometre shows the following measurements:
X Axis: corner edge 19.77mm/middle edge 19.70mm/centre 19.57mm
Y Axis: corner edge 19.57mm/middle edge 19.51mm/centre 19.43mm
Z Axis: corner edge 20.04mm/middle edge 20.05mm/centre 20.02mm

I averaged out the above figures, it looks like the centre of the cube has caved in so I'm going to print using 100% solid and see if that will improve, however my X and Y axis looks like it requires adjusting, does anybody know how to go about adjusting these axis?

Much appreciate your help.