Applied Parameters: Mode=Cut_Polygons
Summary
This command is used to slice one or more polygon pours into two or more separate polygon pours.
Access
This command can be accessed from the PCB Editor by:
- Choosing the Place » Slice Polygon Pour command from the main menus.
- Locating and using the Slice Polygon Pour command (
) on the Active Bar.
If the command has been recently used from the Active Bar, it will become the active/visible button. Where other commands are available, this is indicated by a triangle at the bottom-right corner of the button. Click and hold on the active button to access a menu of all associated commands for that grouping.
Use
The slicer will only work provided the current layer is the layer on which the polygon pour to be sliced resides. Therefore, first ensure that the correct layer is made the current layer.
After launching the command, the cursor will change to a cross-hair and you will enter slice mode (which is essentially line placement mode). To slice a polygon:
- Starting outside the boundary of the polygon, click or press Enter to anchor the starting point for the slicing line (the first track segment).
- Move the cursor to define the track segment then click or press Enter to anchor the end point for this first segment, which is also the start point for the next connected segment.
- Continue to position the cursor then click or press Enter to anchor a series of vertex points that define the series of connected track segments.
- Once the slicing line has been placed across and out the other side of the polygon, right-click or place Esc to terminate line placement.
- Repeat steps 1-4 to slice the same polygon pour or another polygon pour, as required.
- When you have finished all required slicing, right-click or press Esc to terminate slicing - a Confirm dialog will appear asking if you wish to split x polygons into y polygons. Click Yes to effect the split(s).
Note that split polygon sections are not actually marked as modified so a repour of modified polygons will not have any effect. To finalize the split(s) - and to visually see them in the workspace - you will need to manually repour, either by selecting the polygon 'portions' and using the
Repour Selected command or by using the
Repour All command.
Placement Modes
While placing track segments there are five available corner modes, four of which also have corner direction sub-modes. During placement:
- Press Shift+Spacebar to cycle through the five available corner modes: 45 degree, 45 degree with arc, 90 degree, 90 degree with arc, and Any Angle.
- Press Spacebar to toggle between the two corner direction sub-modes.
- When in either of the arc corner modes, hold the
or
keys to shrink or grow the arc. Hold the Shift key as you press to accelerate arc resizing.
- Press the 1 shortcut key to toggle between placing one segment per click (the first five images below), or two segments per click (the last image in the set below). In the first mode the hollow track segment is referred to as the look-ahead segment.
- Press the Backspace key to remove the last vertex.


Press Shift+Spacebar to cycle through the five available corner modes, press Spacebar to toggle the corner direction, press the 1 shortcut to
toggle placement between one segment or two segments.
Tip
Since the slicing line is the same color as the polygon pour, it helps if the polygon is repoured with the Fill Mode set to None (Outlines) before starting the slicing process so the slicing line can easily be seen.