I have a file that is already in its third revision and some things have been removed, but the file size has not decreased. I would like to know if D5 Render has this option to make the file lighter, like purge in Sketchup.
You can try “Clear Data” but please be aware of the warning prompt. You may save a backup of your data and try to do the process just in case this feature is not what you were hoping for since it will also clear the imported list.