Hi Folks, As a follow on to monitor screen sizes and the distance you sit from them, I've made a Jupyter notebook python program that uses adjustment of widgets to model different scenarios. The ipynb file is available from here: https://github.com/irsbugs/monitor-modelling The Jupyter notebook code cell that I wrote was my introduction into using python notebook widgets. Using toggle buttons selection is made of one of four different resolution 16:9 High Definition monitors. Using slider controls adjustments are made to the screen size and the distance from the monitor. For example the following information is displayed when sitting 1 meter from a 28 inch Ultra High Definition monitor: Horizontal Pixels: 1920 Vertical Pixels: 1080 Screen Size: 28in. Screen Size: 71.1cm Width of Screen: 62.1cm Height of Screen: 34.7cm Screen distance: 100cm Viewing Angle: 34.5° Pixels per degree: 55.7 Distance to screen edge: 104.7cm Difference: Centre to Edge: 4.7cm Difference: Centre to Edge: 4.7% There are many on-line guides that recommend optimum viewing angles and screen distances, etc. For example: https://www.rtings.com/tv/reviews/by-size/size-to-distance-relationship Alternatively, if you are not interested in getting a new monitor, then you might like to just look through the jupyter notebook code to get an idea of one way of using widgets. cheers, Ian. Note to Python programmers as of Sep 2019: With Ubuntu 18.04.3 LTS the apt repository loads Jupyter with the version of the notebook server: 5.2.2, where print(ipywidgets.version_info) returns: (6, 0, 0) With Jupyter installation via PYPI in a virtual environment then pip loads Jupyter with the version of the notebook server: 6.0.1, where print(ipywidgets.version_info) returns: (7, 5, 1, 'final', 0) There are some differences in widget behaviour between versions. For example, see in my ipynb code the work-around when I instantiate the Slider widgets.