I'm not entirely clear on exactly what you want to do. If you have two objects with their opacity set to zero, you should be able to overlap them just as in any paint program. (Also check the Fill&Stroke dialog box (Ctrl-Shift-F) for each object and make sure their alpha channel (the A slider) is set to 100 as well). You can control the transparency of the object both by it's alpha channel and by it's overall opacity.

If you are trying to join the two objects (and make them one single object) you can also overlap them, then select them both and choose Path->Union if they are both path objects.

Hope this helps. If you could clarify your question a little bit more that would be great. There are several ways you can use objects together (union, group, combine) depending on exactly what you're trying to achieve.

RQ


RQ