Theme: PCB outline, shape of the board, copper layers, layers

First create a rectangular board with the Outline Wizard. Now click on one of the 4 pink lines. For each line 3 small black boxes appear. In a corner, right-click (M2) on the small black box:

(Image 1: Context menu on the black box)

Select "Round corner" and enter a radius. You do that with all four corners. The wizard is initially only for basic shapes. The board outline is nothing more than a closed polyline on the board outline layer (usually layer 23). You can subsequently edit this outline as required. Make sure that the polyline is properly closed.

Let's design the following small PCB:

( Fig. 2: PCB with roundings)

In the PCB Outline Wizard we start with 31 x 21 mm and for the cutouts on the sides we enter a cutout at the top:

(Fig. 3: Cutout at top center).

Note that the coordinates start from the center: 21 / 2 = 10.5 - 6.5 = 4 mm for the depth of the cutout. And 14 / 2 gives -7 and +7 mm.

Then we click [Continue] and [Finish] until the angular outline is created. Then we round the corners by 5 mm using the context menu of the corresponding black box with M2:

(Fig. 4: Round off all 4 corners)

Now the rounding to the inside in the center remains. To do this, we first set the grid to 0.5 mm:

(Fig. 5: Grid in menu "View")

After that we click the horizontal line and in the context menu of the middle black box we choose that we want to turn the line into an arc:

(Fig. 6: Generate an arc)

We now determine this arc with the mouse by dragging the middle black box down to 21 - 6.5 - 7 = 7.5 mm at X=15.5 mm:

(Fig. 7: Watch the coordinates at the bottom left of the status bar while doing this)

A bit of coordinate calculating is necessary for the mechanical construction. Note that the coordinates now start from the lower left corner (dashed cross at the origin).

The important thing in the whole action is that there is a closed set of lines on plane 23 = board outline. Also of interest for mechanical design are:

- Snap on coordinates that are not on the grid using key [+].
- Intersect lines and arcs: Trim Lines in menu "Actions".