How to make area solid

Hi, I’m completely new to this and therefore my question may seem simple to some and I’m sorry for that :slight_smile: But how do I fill the cavity (marked in red) so that it becomes massive? Regards Den
Test 1

Hi @Den1

Welcome to our community! :wave:

Please don’t worry, this is a place for learning, and you can ask any questions to discuss together.

You can use the “File Holes” function in the software.