Selecting Points, Edges, and Polygons
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Before you can select points, edges, and polygons, make sure you are in PEP editing mode.
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Use the most convenient way to select PEPs. See How
to Select PEPs
for details.
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Verify that you have selected the right PEPs. Highlighting feedback can
help you pinpoint which PEPs you have selected. You can also use this
feedback to pinpoint PEPs you want to select. See Feedback Guides You
for details.
There are a few ways to select points, edges, and polygons:
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Click to select individual PEPs.
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Shift-click to select additional PEPs.
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Shift-click to deselect individual PEPs.
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Sweep Selection: Click outside the object (but still within the
PEP editor) and drag to form a red box around multiple PEPs. This is
called sweep selection. For example, to select
all the endpoints of a cylinder, reposition the cylinder as shown and
drag the cursor to form a box around the endpoints:

Holding down Shift while doing a sweep selection adds to
previously selected PEPs.
Make sure you are not moving any previously selected PEPs when you
drag. When you select PEPs and then drag on the object, you move the
selected PEPs. (See Translating PEPs
for more details.) You should always click on the background within
the PEP editor to initiate a sweep selection.
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Paint to Select PEPs: Use Paint to Select PEPs to
select multiple PEPs with a single drag. Press this button:
and drag to select multiple PEPs. Any previously selected PEPs will
remain selected. If you decide that you'd like to select additional
PEPs after you have finished dragging, press the button again. To
deselect multiple PEPs, press the button, then Shift-drag.
Use Shift-click to deselect individual PEPs.
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Note: A selection is defined by points, and the selection
algorithm connects as many polygons and edges as it can within the area
of points you have selected. When you use Shift to extend a
selection, you can select a point some distance from the initial
selection, and any new edges or polygons that are completed by the
addition of that point will also become selected. Experiment with
selecting PEPs to get the best results. You can use Shift-click
to deselect unwanted points.
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Selected items in the PEP Editor are always rendered so that you can
see selected PEPs when viewing from any angle.
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Points, edges, and polygons appear bright when you pass your cursor
over them.
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Selected points and edges appear yellow with a red center (orange).
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The master selection appears yellow with a black center.
The master, or primary selection is the last point, edge, or
polygon selected.
Special case: Sweep selection defines the master
selection as the point closest to where you click the cursor
when starting the sweep. Paint selection defines the master
selection as the last polygon the cursor passes over.
To redefine the master selection, you may need to deselect a PEP by Shift-clicking
it and reselect that same PEP (again using Shift-click) to make
it the most recently selected PEP (and therefore the master selection).
It is important to define which PEPs make up the master selection
because the master selection is used in alignment. In the example
below, the chimney is slanted (because its top polygon was extruded and
pushed up from the slanted roof). To correctly align the chimney's
edges, you need to pick the slanted edge. If the whole polygon or the
wrong edge is selected, the edges won't align correctly.

See Aligning PEPs for more details.
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