Resizing your scene means choosing the right ratio or format for the support targeted (eCommerce site, social networks, print, etc.), and in particular portrait versus landscape orientation.
Resize scene with custom ratio
You can resize your scene as you wish. You can choose a set ratio or add your own custom ratio.
Here's how to resize your scene with a custom ratio:
Click on Resize in the toolbar
Enter your own ratio in the spaces provided
Save it, naming it for easier access
The working window resizes automatically
Generate your render