Clicking and selecting the object, click on the little A.
Or after selecting it, select Attributes... from the upper objects menu.
Select any one of the boolean operations.
Perform processing of another object as well.
Clicking and selecting the processing object, click on the little A.
Or after selecting it, select Attributes... from the upper objects menu.
Select a boolean operation.
Since the Negative is selected here, it follows that the positive boolean object is hollowed by the negative boolean object.
Select all the objects performed the boolean operations.
Click on the little G, group them into one gruoup.
The boolean objects is created.
