Python/Open3D: How to set axis labels, ticks, and control the window size etc

Question

I am trying to use Open3D to plot a large .laz file. I am looking to do the following:

a) ways to set the labels for X,Y,Z axes

b) See the dimensions of the X/Y/Z axes (the "ticks")

c) Get back the control to the python/spyder (without waiting for the window to be closed)

Below is the sample code.

import open3d as o3d 
import numpy as np

points = np.random.randn(1000,3)
colors  = np.ones((1000,3))*0.7
pc = o3d.geometry.PointCloud()
pc.points = o3d.utility.Vector3dVector(points)
pc.colors = o3d.utility.Vector3dVector(colors)
o3d.visualization.draw_geometries([pc])