No PCB when starting a new project

[gooberpat]

I have drawn a circular board outline (using mechanical layer 1) and placed 4 switch contacts of copper (top layer) with in the circle. However, I don't have a PCB. When I generate gerbers I see only the 4 switch contacts but no board outline or PCB - just the four switch contacts floating in space. I must have missed a step, but I don't know what.

[qdrives]

Activate mechanical layer 1.
Goto single layer mode with only that layer visible (shift-S)
Design / Board shape / Define board shape from selected components.

[robertferanec]

Sometimes, when you are redrawing the whole PCB you need to tell altium what stackup that PCB is using - sometimes this information is lost during redrawing and no PCB is visible.

Be sure it is assigned correctly, you can use PCB Panel -> Layer Stack Regions to double check that

[Abdullah Ansari]

Select outline and press dsd on leyboard.