How do I create a void in a power plane?

I want to remove an area of copper from a power plane but can't work out how to do this.
I'm sure it's obvious if you know how!
Please could a kind soul point me in the right direction?
Thanks
Dave

Hi David:
If the delete island way works, that's great. Still, I think I'm either not explaining my solution correctly or understanding the problem you're describing. Even if it doesn't help you, it might help others, so I'll describe with an example.
The example I'm describing is attached below.
There are three nets (GND, 1, and 2) in the example, and two parts. The two parts are connected by nets 1 and 2 and GND is assigned to the power plane. Once I placed the power plane, I setup the groups and keep out to create the void.
1. Place > Keep-in/Keep-out Area. Draw the area where you want the void. You will have DRC errors at this point, and we will now remove them.
2. We need to assign the net GND to a net group so it can be associated with the Keep-out area. Tools > Group Editor. On the Net Groups tab, click Add, and create a
new group GROUP_GND. Then assign only net GND to the group.
3. Select the Keep-in/keep-out layer in the design toolbox. (The selection filter can be set to Enable Selecting Other Objects). Select the Keep-out area, then Edit > Properties. The Keep-in/keep-out properties should show. On the Keep-in/keep-out tab, check the box next to Net Group. Then click the Options... button beside Net Group. Uncheck All Groups at the bottom, and check GROUP_GND. Click OK, click OK.
4. The DRC errors should be gone because the keep-out only applies to net group GROUP_GND.
I hope this explanation clears up my ambiguity from before, even if it doesn't help in the end.
Garret
Senior Software Developer
National Instruments
Circuit Design Community and Blog
If someone helped you, let them know. Mark as solved or give a kudo.
Attachments:
ppvoid1.ewprj ‏16 KB

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