Create and use group filters and invert filters

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Start by clicking on the second filter icon above the filters list.

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A group filter doesn't have a dialog interface.

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It just creates a new filter in the tree list.

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But like the property filter, you'll be prompted right away for a name.

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Let's call it red layers.

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As I said,

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it's empty to begin with. Let's go back to the built in all filter

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and then click on the color header to sort by color.

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Click it again to change the sort to a sending

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the red layers should be at the top

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using your shift key, select the six red layers

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drag and drop them onto your new group filter.

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The layers will deselect but still appear in the all filter,

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change your filter to red layers and you will see

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the six layers you just moved into the group.

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So through various methods, possibly including the filters you just created,

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you have the very important task of getting your layers set up the way you need to,

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you can save those settings to a layer state within the drawing

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and even export it for use elsewhere or just for safe keeping.

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Let's make some changes to our layers before we get started,

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click on the name hitter to resort alphabetically and by name,

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click on the arch floor filter

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then double click on a

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floor to make it current

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at the bottom of the filters list. You'll see an invert filter check box

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click on it and it will reverse the effects of the selected filter.

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Now we have everything except the a

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floor layer showing

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click on the A a

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dims layer near the top,

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then control a on your keyboard to select all of the displayed layers.

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Click on any thaw icon to toggle them all to freeze.

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You should see that most of the layers in the drawing are now frozen and do not display

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single click on the A A

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dims layer to exit the multiple layer selection.