QGIS Tips and Tricks: How to Digitize a Perfect Building Footprint 

thanks for the demo, @geodose video 2:04 how to obtain exact 90 dagree as last of digitized angles (between firrst, second last & last vertices)?

Advanced digitizing panel not work properly . angel and distance filed not enabled and 90 degree refarence not showing though i set is on mode .. i usge qgis 3.22 verson . how can i solve it??