Hi AppleBoy123,
Re: "How do I increase the font size in the Console app on Sonoma MacOS?"
The Console User Guide doesn't seem to have any info. at all on a change of font-size:
You may want to use the Zoom feature:
Zoom in and out on what’s onscreen on Mac - Apple Support
or
With Hover Text on your Mac, you can just move the pointer over text on the screen to display a larger version of it: Eg: Use Hover Text on Mac - Apple Support says:
How to: "Turn on Hover Text
- On your Mac, choose Apple menu
> System Settings, click Accessibility
in the sidebar, then click Zoom on the right. (You may need to scroll down.) - Turn on Hover Text."
Now when you "move the pointer over text on the screen,
you can press the Command key to display a larger version".
If you try hover text, and it works for you ... there's also a "Tip" in the Hover Text article above,
that gives you a quick way to have Hover text on automatically instead, (or turn it off) so you needn't press the Command key every time.
All the best :-)