How to set table or matrix column widths in a Power BI report

How to manually set column width in pixels for tables or matrixes in a Power BI report
Timecodes
0:00 Intro
0:21 Turn off auto-size width
0:35 Change width for each column
0:57 Ensure the page has a display name
1:16 Enable save as .pbip (if not already done)
1:53 Save as .pbip in a new folder
2:35 Navigate to the .pbip folder
2:51 Open report.json in VS Code to edit it (unsupported)
3:58 Find the columnWidth property (report.json)
4:39 Set the "Value" and save the report.json
5:13 Open the .pbip file to observe the result
Sorry for my voice, I'm sick and don't have time to record this, later.