Since Igor 2022 release.
The LogViewer can be reached from the admin window and allows to view the contents of the log files.
The tab at the top allows you to switch between the different logging facilities, a date input lets you pick the day to display, and a filter field lets you do a simple string match based reduction of the viewed entries.
Use the dontlog configuration setting to disable/enable specific logging.
If the LogViewer cannot be reached, you can find the log files in your file system on e.g.