1. Click Horizontal on the plane selection toolbar.

2. Digitise a point to set the elevation of a horizontal plane.

3. (Optional) Use the spin controls or enter a value to Offset the plane along the normal by a set amount. A negative offset value is allowed.

   The point you have digitised are used to populate a Text Edit box at the top of the Plane Selection pane.

   The Text Edit box can also be used to create or edit a plane from a string. The string format shows the plane selection mode and a zero or non-zero (if specified) offset value, followed by the elevation value.

   

1. Click Vertical on the plane selection toolbar.

2. Digitise two points to define a vertical plane.

3. (Optional) Use the spin controls or enter a value to Offset the plane along the normal by a set amount. A negative offset value is allowed.

The points you have digitised are used to populate a Text Edit box at the top of the Plane Selection pane.

The Text Edit box can also be used to create a plane from a string. The string format shows the plane selection mode and a zero or non-zero (if specified) offset value, followed by the string format used for the conversion, which is “(x, y, z) | <a, b, c>“ where each lettered character can be a decimal number. (x, y, z) refers to the point of the plane. <a, b, c> refers to the vector normal of the plane.

1. Click Slope on the plane selection toolbar.

2. Digitise two points to define a slope plane.

3. (Optional) Use the spin controls or enter a value to Offset the plane along the normal by a set amount. A negative offset value is allowed.

The points you have digitised are used to populate a Text Edit box at the top of the Plane Selection pane.

The Text Edit box can also be used to create a plane from a string. The string format shows the plane selection mode and a zero or non-zero (if specified) offset value, followed by the string format used for the conversion, which is “(x, y, z) | <a, b, c>“ where each lettered character can be a decimal number. (x, y, z) refers to the point of the plane. <a, b, c> refers to the vector normal of the plane.

1. Click Three Points on the plane selection toolbar.

2. Digitise three non-collinear points to define a plane.

3. (Optional) Use the spin controls or enter a value to Offset the plane along the normal by a set amount. A negative offset value is allowed.

The points you have digitised are used to populate a Text Edit box at the top of the Plane Selection pane.

The Text Edit box can also be used to create a plane from a string. The string format shows the plane selection mode and a zero or non-zero (if specified) offset value, followed by the string format used for the conversion, which is “(x, y, z) | <a, b, c>“ where each lettered character can be a decimal number. (x, y, z) refers to the point of the plane. <a, b, c> refers to the vector normal of the plane.

1. Click Point Normal on the plane selection toolbar.

2. Digitise two points that define the origin and the normal of a plane.

3. (Optional) Use the spin controls or enter a value to Offset the plane along the normal by a set amount. A negative offset value is allowed.

The points you have digitised are used to populate a Text Edit box at the top of the Plane Selection pane.

The Text Edit box can also be used to create a plane from a string. The string format shows the plane selection mode and a zero or non-zero (if specified) offset value, followed by the string format used for the conversion, which is “(x, y, z) | <a, b, c>“ where each lettered character can be a decimal number. (x, y, z) refers to the point of the plane. <a, b, c> refers to the vector normal of the plane.

To invert the currently defined plane, click Invert Plane on the plane selection toolbar.

A vertical plane is inverted by swapping the two points and the mode does not change. When a horizonal or slope plane is inverted, the mode changes to Point-Normal. This is because a horizontal or slope plane always has a normal of <0,0,1>. The inverse is a normal of <0,0,-1> and this is only possible with a point normal plane definition.