I was exploring cool fonts in Tableau, well, it is a good effort to select and change each title, filter, colour legend, etc. one by one. Luckily, there is a quick way of doing that.

Step1: From the top tool bar select Format, go to Workbook

Step2: Click on the triangle dropdown under All, select your favourite font, done!

This is my Tableau dashboard for Dashboard Week Day3:

https://public.tableau.com/views/Long-TermProductivity/Dashboard?:display_count=y&:origin=viz_share_link

And here is my first PowerBI Dashboard on the same day: