Say you start with 3 concentric, flat circles:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiA6DabqWl8tr7EGskbQGMSOcK1M63rfj0fbiy2EKsYeRhCCZCmz4v6p5YMzhXYRput4mU5cNkYn9iNQdXHPtgzVzFnGsNlTPh3ZleCJsXfm051nGEc88nSqSTnue3AdmitMrHqRf3a8K0c/s320/PushPullCtrl01.png)
This is what you get when you use Push/Pull on the red circle:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisZsAOR264AbgDglnoL9Op5aAmAWP18J67A50hXDaJUw9ejv-YvoVKRZobra_9mDI3mqzjtHTQSCDuFvDP8uX09CceGWBJ2yiT-g0RS2J0Fxez6DhdMMofmaLZaYD-yIn-ZVAql_WtZY8f/s320/PushPullCtrl02.png)
But this is how the underside looks - the original circle has been "sucked" up to the top of the red cylinder. What if you want to keep that face there?
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikvvBoJZJgXnb07isfWTedPw91qWXw5oIsi55-lU4D9lOsCcw_BjggBX4EZ4tOz6Bvp8iBLBep0xUktjo4xGTiveDgkrBQMwWxsqJHyJX5slQ4Z42rHt77l7tSFGTWu4T-osOn8FUXVC45/s320/PushPullCtrl03.png)
The pulled faces always disappear when they are within other faces. If you pulled up the yellow and green circles, only the outer (green) circle would remain on the bottom.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiY9WUQI1mNmNOvyearRzcB4IH1Gb4SpAzEPQZBWidtM-JFyKABtjKDxfCI1BI0LQK6rgiu3uyZ4zkzIqc70DlimHF4-q74JwgKcdxrat5EMSmtuKiUgLpQYYSD3c9mlEQSQvOf8xVLkbr6/s320/PushPullCtrl04.png)
Here's how you can preserve the pulled face. Starting over with the flat circles, activate Push/Pull then press (don't hold) Ctrl/Option. You'll see a "plus" sign on your cursor. Pull up as normal; from this view the result looks the same as before.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguturtz8qzLqzDJu0myEAYNl1W1FrNcPisaQMW5qJMA7KdqOMHcUeApOYV4d5pt4au2Tm4xefYm9_GQn8-DisEqI2uhcKaDXrYnsw4SfpEO8mCnUS-RiSq-1FTftV5ypp3zBizkw-ueV06/s320/PushPullCtrl05.png)
But on the underside, you still have the face at the center of the circles. It's been switched from front to back (the color is the "back" color), and I have no idea why this happens, but at least the face is still there.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVZUrKyjcxrILN-IS-tYpbjLUAnWYtd7l4I89OgfTBRkqnFsMemkk2CL1B49re1O_JxWSm5l0RW2P0KeoP9QB_IbV6Mktja3XQOPu7Wrs25YwKvgdGhHt104nSh4uDKaDsUzsSt1BJt_Np/s320/PushPullCtrl06.png)
If you then use Ctrl/Option for the yellow and green faces (you have to press the key anew each time), you'll keep all three faces at the bottom.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5_w7v-Nyjf2JIrUbz0VG0iYNEaZJhEpe9Rqccj-iuvgRt4f9GtnZ32cX71EjmaQ_CFPgKxAXvNfB1KLUO8_P6qRkfFvvG1fEdJqpbof46DHqM6ITXQBnUMDLfvSNrDEOzAQBTfa7Tjx8C/s320/PushPullCtrl07.png)
Here's a more practical application: cutting a window. The flat orange face below is to be pulled forward, to create the window moulding.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjzqdoDV1jR0ozZKl7vdlDujehF5D2z2IeLfJeRjr-tlgrE0iDq1LRkwspf2NDD-BY86dneypLcn28XerXeyQWguDgTgEm5lsrkva7pUyM0Jdi4NXX7kX-orYmJ0J6zAbIdF1A3igmdNq1H/s320/PushPullCtrl08.png)
With or without the Ctrl/Option key, the window will look fine from inside the room.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXTg6yKVsGKnhKxe1edYnFC8wkpVbDCCVvIkhXmlcbv5iBapre29DVoNzO-OZzfzc2su694NNDA42VaOUs-3LEZMXPZMYR1F4hdVZlVEkhVqYEDmbtf3XfonuFUmbHqLFoE0wShIhOSZk5/s320/PushPullCtrl09.png)
But here's how it looks from the outside, without the modification - the moudling face was sucked back into the room.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisJD-Avgex0mrHi5ysre2kAIAw274tqMC-VuUvfKGW-jjxPd-7DFRgCBDpRAgASrV8lr02HgKHGrPJavf3i1rmGAI8LeG_zlEv04VLwssrxnlA8bfhxF1woJAaIk2BVo2GO9lZyblz6cDF/s320/PushPullCtrl10.png)
With the Ctrl/Option key, you keep the face (albeit reversed) within the wall.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQkNPymLeK7aX3sYRKvOed__TxTHOZFHmRqijZ-VyZjYS6BRFusM8cDzXSh7dmudKqA6m1DMQFCcLea-seaXL_gGOlrxX4HTx7jGyER8uw2jfPzk7ymZUVRFGVDSQA2Kpn0b3c7PTzHnSW/s320/PushPullCtrl11.png)
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3 comments:
Thanks for this useful post.
Thanks for this one. It has been a problem with which I have wrestled, unsuccessfully so having this tip is a real plus for me. Thanks.
Thanks for this tip Bonnie. Losing the face with push/pull has been a challenge to overcome and now I have the key. Thanks.
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