That does not seem to be working as one would expect. At least not when using VS Code with platformio.
When you set:
force_verbose = yes
And you then compile, you still get a message that you can user "–verbose"for verbose output. And your compile still isn’t verbose. So that setting has no effect on compile output.
The screenshots of @wgt do work (aka, click Verbose Build in platformio itself).
It would be really helpful (and much more intuitive) if force_verbose = yes would effectively do a verbose build too.
Edit
I’m wrong… kind of.
When one does: pio settings set force_verbose 1 then it does work as expected.
I have no clue where this setting is supposed to be stored in config files. It definitely doesn’t work in your project settings platformio.ini.
It also doesn’t work if one does:
[platformio]
force_verbose = yes
… I know how to get it working now (executing that pio command) but i find it super vague and magic that it does work now.