Altium Designer : Creating Custom Board Outline and Keepout Area

Adding a keep-out area along the board outline is a good design practice. The recommended keep-out line thickness is 20 mil.

Altium Designer : Shorcuts for Routing and Toggling Single Layer Mode

Altium Designer: Useful Shortcuts for Component Placement

  - Rotate counterclockwise by 90 degrees while moving an object: SPACEBAR
  - Align selected objects by top edges: SHIFT + CTRL + T
  - Distribute selected objects equally in the horizontal plane : SHIFT + CTRL + H
  - Align selected objects by left edges: SHIFT + CTRL + L
  - Align selected objects by right edges: SHIFT + CTRL + R
  - Distribute selected objects equally in the vertical plane : SHIFT + CTRL + V
  - Align selected objects to grid: SHIFT + CTRL + D
  - Align selected objects by bottom edges: SHIFT + CTRL + B

Altium Designer : Pcb Panelization

On the Place tab, Select Embedded Board Array/ Panelize. Click anywhere in the PCB area. Under the Properties menu, select your PCB and set the desired Column margin and Row spacing.

Altium Designer : Creating Board Outline From Mechanical Outline and Making Cutout Holes

Select Mechanical Outline. Under the Properties menu, Change the Mechanical outline layer to the user-defined board outline layer.
To create a custom board shape, select the board outline that has been created. On the Design Tab, in the board shape, select Define from selected Objects.
To create a cutout hole, select the desired outline. On the Tool Tab, in the Convert, select Create Boardcutout from selected primitives.