GTV "evidence of earnings"

Hi,

I recently switched from Tier 2 to GTV (academic route).
I am eligible for the ILR via 3 years route.
I read that "you must demonstrate that you have earned money in the UK during your last period of permission in the field in which you were previously endorsed on the Global Talent route."

Anyone has idea for how many months evidence of earnings/salary one has to show and what specific documents required like salary slip is acceptable?

Thanks.

See: indefinite-leave-to-remain/ilr-from-any ... l#p1990369

The best is to submit a compact document including payslips and employment letters of your jobs and payments during the period you were on GTV. The aim is to show that you were not jobless and earned money in your field with your GTV in the UK.