How can I move blocks from one building to another one?

If you have blocks in more than one building that you would like to combine into the same building you can use the "Transfer blocks" option from the Edit menu.

This might be useful in cases you have started creating a project in two different files and have merged both files using the import option.

You can find further information on Program help:

https://designbuilder.co.uk/helpv7.0/#Transfer_Blocks.htm

Note: DesignBuilder only runs one building level simulation at a time.