Hi @N-NEJATISHAHIDIN,

thanks for reporting the bug. The green crosshairs should never be that far away from the cursor.
However, I can not replicate that same behaviour on my machine with the current version; here the cursor works as expected.

Can you give me some more details about the behaviour …

1. Is the crosshair at a constant distance from the cursor or "jumping"?
   … and your setup …
2. OS and Python version
3. Versions of the depencies (especially your PyOpenGL version)
   → use pip list or conda list

Best,
Christoph

PS: You can only change the size of the currently active bounding box (marked with green color).

Thanks for your quick response!

1. It does not jump but it changes slightly. I have uploaded a video.
   https://user-images.githubusercontent.com/60449580/115168870-64159880-a08a-11eb-9c59-b7b1d69149e8.mov

2)python 3.6.7, OS Mac 10.15.7
3)
Package Version

addict 2.4.0
appnope 0.1.2
argon2-cffi 20.1.0
async-generator 1.10
attrs 20.3.0
backcall 0.2.0
bleach 3.3.0
cffi 1.14.5
cycler 0.10.0
decorator 5.0.7
defusedxml 0.7.1
entrypoints 0.3
importlib-metadata 4.0.0
iniconfig 1.1.1
ipykernel 5.5.3
ipython 7.16.1
ipython-genutils 0.2.0
ipywidgets 7.6.3
jedi 0.18.0
Jinja2 2.11.3
joblib 1.0.1
jsonschema 3.2.0
jupyter-client 6.2.0
jupyter-core 4.7.1
jupyterlab-pygments 0.1.2
jupyterlab-widgets 1.0.0
kiwisolver 1.3.1
MarkupSafe 1.1.1
matplotlib 3.3.4
mistune 0.8.4
nbclient 0.5.3
nbconvert 6.0.7
nbformat 5.1.3
nest-asyncio 1.5.1
notebook 6.3.0
numpy 1.19.5
open3d 0.11.2
packaging 20.9
pandas 1.1.5
pandocfilters 1.4.3
parso 0.8.2
pexpect 4.8.0
pickleshare 0.7.5
Pillow 8.2.0
pip 21.0.1
pluggy 0.13.1
plyfile 0.7.3
prometheus-client 0.10.1
prompt-toolkit 3.0.18
ptyprocess 0.7.0
py 1.10.0
pycparser 2.20
Pygments 2.8.1
PyOpenGL 3.1.5
pyparsing 2.4.7
PyQt5 5.15.4
PyQt5-Qt5 5.15.2
PyQt5-sip 12.8.1
pyrsistent 0.17.3
pytest 6.2.3
python-dateutil 2.8.1
pytz 2021.1
PyYAML 5.4.1
pyzmq 22.0.3
scikit-learn 0.24.1
scipy 1.5.4
Send2Trash 1.5.0
setuptools 39.0.1
six 1.15.0
sklearn 0.0
terminado 0.9.4
testpath 0.4.4
threadpoolctl 2.1.0
toml 0.10.2
tornado 6.1
tqdm 4.60.0
traitlets 4.3.3
typing-extensions 3.7.4.3
wcwidth 0.2.5
webencodings 0.5.1
widgetsnbextension 3.5.1
zipp 3.4.1

Thanks for the video,

I still cannot reproduce the same behavior with the same dependencies. However I think it could be due to a problem of GLU.gluUnProject with Mac. Are you using a retina display?

I applied the described fix in a new branch mac-retina-fix. Could you please clone this branch into a new folder and try again:

git clone --branch mac-retina-fix https://github.com/ch-sa/labelCloud

Also there will be a new DEBUG output in the terminal; could you please copy that here?

I do use the Retina display.
Thanks, It works!

This is the DEBUG output :

That's great to hear. I will merge that branch soon into master. Until then the branch should be stable enough to be used already.