If you draw on paper and need to storyboard a film in 16:9 format, this free PDF storyboard template is for you.
This template has two DIN A4 horizontal sheets with nine frames per page, in 16:9 (1.77:1) aspect ratio, ready to use, awaiting your drawings.
You can print it out and start drawing on paper. Another way you can use this template: open it in Photoshop, choose crop to Art Box or Crop Box in Import PDF > Page options and draw your board on a new blank layer.
You can get an editable version of this template for Procreate here: https://gum.co/16x9_storyboard_procreate_9-frames_A4_hrzntl.
There is also a desktop publishing version of this template for InDesign, with much more variations and choices available here: https://gum.co/16x9-ID-Av-Nxt-hrztl.